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Computer systems a - computer,

Computer systems a - computer,

$78.37
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Imprex prime pos system - pos,

Imprex prime pos system - pos,

$299.99
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Riana rouge computer big - riana,

Riana rouge computer big - riana,

$49.00
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Dell optiplex 7050 intel - mt,

Dell optiplex 7050 intel - mt,

$149.99
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Fast ship computer - ship, systems:

Fast ship computer - ship, systems:

$35.90
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The elements computing - of,

The elements computing - of,

$35.23
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Intel nuc mini - mini, pc

Intel nuc mini - mini, pc

$139.99
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Intel nuc dc3217iye - dc3217iye, mini

Intel nuc dc3217iye - dc3217iye, mini

$50.00
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Higolepc mini computer 1 - higolepc, 10.1"

Higolepc mini computer 1 - higolepc, 10.1"

$334.99
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Computer systems a - systems:,

Computer systems a - systems:,

$117.99
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Computer multimedia usb - computer,

Computer multimedia usb - computer,

$39.99
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Advantech mic 7700q fanless - advantech,

Advantech mic 7700q fanless - advantech,

$249.99
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Juniper systems allegro - systems, 2

Juniper systems allegro - systems, 2

$719.99
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Dell optiplex 9020 7020 - 9020/7020, mt

Dell optiplex 9020 7020 - 9020/7020, mt

$99.99
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Mini 600 desktop - g9,

Mini 600 desktop - g9,

$154.99
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Lsi computer systems ls7084n - computer,

Lsi computer systems ls7084n - computer,

$12.48
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Asrock deskmeet x600 series - asrock,

Asrock deskmeet x600 series - asrock,

$183.99
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Military army computer - military,

Military army computer - military,

$3.25
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Dell precision t3610 xeon - precision, t3610,

Dell precision t3610 xeon - precision, t3610,

$110.49
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Cissp certified - (isc)2,

Cissp certified - (isc)2,

$4.94
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Martin kleppman designing - martin,

Martin kleppman designing - martin,

$40.00
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Asrock deskmini x600 - asrock,

Asrock deskmini x600 - asrock,

$163.49
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Dell optiplex 9020 - dell, mt

Dell optiplex 9020 - dell, mt

$69.99
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Nec ops desktop computer - desktop, amd

Nec ops desktop computer - desktop, amd

$59.99
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Asrock deskmeet x300 - asrock,

Asrock deskmeet x300 - asrock,

$193.99
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Management information systems - information,

Management information systems - information,

$8.78
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Silicon graphics computer - silicon,

Silicon graphics computer - silicon,

$21.99
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Vba for modelers - modelers:, developing

Vba for modelers - modelers:, developing

$4.86
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Refrigeration air - &,

Refrigeration air - &,

$135.00
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Powerful windows retro - i5,

Powerful windows retro - i5,

$299.00
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Systems analysis and design - systems,

Systems analysis and design - systems,

$50.00
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Dell optiplex 790 - optiplex, mt

Dell optiplex 790 - optiplex, mt

$79.99
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Dell optiplex 3020 desktop - dell,

Dell optiplex 3020 desktop - dell,

$59.99
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Operating systems three easy - operating,

Operating systems three easy - operating,

$27.54
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Linux basics for hackers - for,

Linux basics for hackers - for,

$10.23
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Cissp certified information - certified,

Cissp certified information - certified,

$4.82
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Operating systems design - operating, and

Operating systems design - operating, and

$7.58
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Logitech z407 1 bluetooth - logitech,

Logitech z407 1 bluetooth - logitech,

$68.95
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Digital electronics principles - electronics,

Digital electronics principles - electronics,

$45.99
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Vtg 1981 hewlett packard - hewlett, hp

Vtg 1981 hewlett packard - hewlett, hp

$24.99
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Good used delta - used!,

Good used delta - used!,

$403.71
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Building telephony systems - building,

Building telephony systems - building,

$18.53
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Concurrency control and - control,

Concurrency control and - control,

$14.89
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Computer organization and - computer,

Computer organization and - computer,

$33.34
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Kinematics and dynamics - kinematics,

Kinematics and dynamics - kinematics,

$7.89
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Bosgame vta 439 barebone mini - vta-439,

Bosgame vta 439 barebone mini - vta-439,

$611.99
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Microprocessor systems design - microprocessor,

Microprocessor systems design - microprocessor,

$23.88
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Database systems design - database,

Database systems design - database,

$43.52
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Dos for dummies dan gookin - dan,

Dos for dummies dan gookin - dan,

$3.69
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Systems analysis and - analysis,

Systems analysis and - analysis,

$86.34
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Embedded systems design an - systems,

Embedded systems design an - systems,

$3.87
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Automating manufacturing - automating,

Automating manufacturing - automating,

$55.00
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Designing machine learning - machine,

Designing machine learning - machine,

$35.00
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Microprocessor systems design - systems,

Microprocessor systems design - systems,

$7.35
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Cissp certified - cissp,

Cissp certified - cissp,

$4.52
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Systems thinking managing - systems, thinking:

Systems thinking managing - systems, thinking:

$4.82
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But how know the - it, know?

But how know the - it, know?

$8.31
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Telecommunications wiring - telecommunications,

Telecommunications wiring - telecommunications,

$79.99
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New t530 thin client - t530,

New t530 thin client - t530,

$39.99
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Designing distributed systems - distributed,

Designing distributed systems - distributed,

$37.86
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Lenovo thinkcentre m720q - thinkcentre, i5

Lenovo thinkcentre m720q - thinkcentre, i5

$91.99
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Unix and linux system - and,

Unix and linux system - and,

$8.31
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Computer systems that - computer,

Computer systems that - computer,

$10.93
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Comptia certification - comptia, a

Comptia certification - comptia, a

$21.15
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Security patterns - patterns,

Security patterns - patterns,

$12.40
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Queueing systems volume - queueing, systems,

Queueing systems volume - queueing, systems,

$5.89
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Compatible key 2 - compatible, m.2

Compatible key 2 - compatible, m.2

$23.65
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Vintage hds viewstation human - hds,

Vintage hds viewstation human - hds,

$64.99
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Dell optiplex 790 990 tower - dell, 790/990

Dell optiplex 790 990 tower - dell, 790/990

$49.99
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Introduction computing - introduction,

Introduction computing - introduction,

$12.94
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Dell optiplex 9010 7010 - dell, mt

Dell optiplex 9010 7010 - dell, mt

$84.99
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Prodesk 400 i3 9100t - prodesk,

Prodesk 400 i3 9100t - prodesk,

$99.00
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Mcgraw hill series computer - series, in

Mcgraw hill series computer - series, in

$25.50
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Systems analysis and design - systems,

Systems analysis and design - systems,

$7.47
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Programming massively parallel - massively,

Programming massively parallel - massively,

$85.45
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Thin client t640 usff amd - thin,

Thin client t640 usff amd - thin,

$89.00
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Computer systems that learn - that,

Computer systems that learn - that,

$8.94
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Accounting information systems - accounting,

Accounting information systems - accounting,

$5.66
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Dos for dummies paperback by - dos,

Dos for dummies paperback by - dos,

$3.88
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Computer controlled systems - computer-controlled,

Computer controlled systems - computer-controlled,

$9.69
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Essentials systems analysis - of,

Essentials systems analysis - of,

$7.26
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Fundamentals information - fundamentals,

Fundamentals information - fundamentals,

$4.49
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Introduction information - to,

Introduction information - to,

$3.50
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Turtles termites and - turtles,, traffic

Turtles termites and - turtles,, traffic

$4.46
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Operating systems principles - operating, systems:

Operating systems principles - operating, systems:

$17.37
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Fundamentals information - fundamentals, of

Fundamentals information - fundamentals, of

$26.80
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How linux works what every - linux,

How linux works what every - linux,

$7.29
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Essentials mis paperback - essentials,

Essentials mis paperback - essentials,

$6.72
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Computer systems a - computer,

Computer systems a - computer,

$45.50
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Gaming sound bar - &, hifi

Gaming sound bar - &, hifi

$20.99
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Unix systems programming - programming:, comm

Unix systems programming - programming:, comm

$5.72
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The non designer - the, design

The non designer - the, design

$3.88
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Dell optiplex 780 - dell,

Dell optiplex 780 - dell,

$99.99
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Compaq elite 8000 usdt c2d - elite,

Compaq elite 8000 usdt c2d - elite,

$60.00
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📊94 listings · from $3.25 · avg $72.44

Browse 94 computer systems listings currently in our index. Prices range from $3.25 to $719.99, with an average of $72.44. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about computer systems →

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Everything you need to know about computer systems

Whether you are looking for a brand-new or second-hand computer systems, eBay offers one of the largest selections available online. With 94 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at $3.25, while premium listings can reach $719.99 — giving you a wide budget spread to work with. The average price of $72.44 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

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