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Computer systems a - computer,

Computer systems a - computer,

$78.37
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Imprex prime pos system - imprex,

Imprex prime pos system - imprex,

$299.99
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Riana rouge computer big - computer,

Riana rouge computer big - computer,

$49.00
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Dell optiplex 7050 intel - 7050, mt

Dell optiplex 7050 intel - 7050, mt

$149.99
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Fast ship computer systems - fast, systems:

Fast ship computer systems - fast, 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,

Intel nuc mini - mini,

$139.99
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Intel nuc dc3217iye mini pc - intel,

Intel nuc dc3217iye mini pc - intel,

$50.00
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Higolepc mini computer 1 - mini, |

Higolepc mini computer 1 - mini, |

$334.99
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Computer systems a - systems:,

Computer systems a - systems:,

$117.99
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Computer multimedia usb - multimedia,

Computer multimedia usb - multimedia,

$39.99
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Advantech mic 7700q fanless - mic-7700q,

Advantech mic 7700q fanless - mic-7700q,

$249.99
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Juniper systems allegro - juniper,

Juniper systems allegro - juniper,

$719.99
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Dell optiplex 9020 - optiplex, 9020/7020

Dell optiplex 9020 - optiplex, 9020/7020

$99.99
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Mini 600 desktop - g9,

Mini 600 desktop - g9,

$154.99
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Lsi computer systems ls7084n - lsi,

Lsi computer systems ls7084n - lsi,

$12.48
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Asrock deskmeet x600 series - deskmeet,

Asrock deskmeet x600 series - deskmeet,

$183.99
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Military army computer - u.s.,

Military army computer - u.s.,

$3.25
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Dell precision t3610 - t3610,, xeon

Dell precision t3610 - t3610,, xeon

$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 amd - x600,

Asrock deskmini x600 amd - x600,

$163.49
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Dell optiplex 9020 7020 - 9020/7020, mt

Dell optiplex 9020 7020 - 9020/7020, mt

$69.99
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Nec ops desktop computer amd - nec,

Nec ops desktop computer amd - nec,

$59.99
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Asrock deskmeet x300 - , pc

Asrock deskmeet x300 - , pc

$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 developing - vba,

Vba for modelers developing - vba,

$4.86
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Refrigeration air - &,

Refrigeration air - &,

$135.00
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Powerful windows retro - powerful, i5

Powerful windows retro - powerful, i5

$299.00
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Systems analysis and - analysis,

Systems analysis and - analysis,

$50.00
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Dell optiplex 790 - optiplex, tower

Dell optiplex 790 - optiplex, tower

$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 - three,

Operating systems three easy - three,

$27.54
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Linux basics for - linux,

Linux basics for - linux,

$10.23
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Cissp certified information - cissp:,

Cissp certified information - cissp:,

$4.82
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Operating systems design and - systems:,

Operating systems design and - systems:,

$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 - vtg,

Vtg 1981 hewlett - vtg,

$24.99
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Good used delta computer - good, used!

Good used delta computer - good, used!

$403.71
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Building telephony systems - telephony,

Building telephony systems - telephony,

$18.53
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Concurrency control and - concurrency,

Concurrency control and - concurrency,

$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 - vta-439, mini

Bosgame vta 439 barebone - vta-439, mini

$611.99
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Microprocessor systems design - systems,

Microprocessor systems design - systems,

$23.88
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Database systems design - systems:,

Database systems design - systems:,

$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 design - systems,

Systems analysis and design - systems,

$86.34
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Embedded systems design - embedded, an

Embedded systems design - embedded, an

$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 - microprocessor,

Microprocessor systems design - microprocessor,

$7.35
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Cissp certified - (isc)2,

Cissp certified - (isc)2,

$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 - do,

But how know - do,

$8.31
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Telecommunications wiring - telecommunications, by

Telecommunications wiring - telecommunications, by

$79.99
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New t530 thin client - new, hp

New t530 thin client - new, hp

$39.99
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Designing distributed systems - distributed,

Designing distributed systems - distributed,

$37.86
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Lenovo thinkcentre m720q - lenovo,

Lenovo thinkcentre m720q - lenovo,

$91.99
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Unix and linux - unix,

Unix and linux - unix,

$8.31
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Computer systems that - systems, learn

Computer systems that - systems, learn

$10.93
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Comptia certification - comptia, a

Comptia certification - comptia, a

$21.15
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Security patterns - security,

Security patterns - security,

$12.40
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Queueing systems volume 2 - systems,,

Queueing systems volume 2 - systems,,

$5.89
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Compatible key 2 - compatible, 2.5gbps

Compatible key 2 - compatible, 2.5gbps

$23.65
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Vintage hds viewstation - hds,

Vintage hds viewstation - hds,

$64.99
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Dell optiplex 790 - dell, tower

Dell optiplex 790 - dell, tower

$49.99
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Introduction computing - introduction,

Introduction computing - introduction,

$12.94
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Dell optiplex 9010 7010 - optiplex, mt

Dell optiplex 9010 7010 - optiplex, mt

$84.99
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Prodesk 400 i3 - hp, g5

Prodesk 400 i3 - hp, g5

$99.00
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Mcgraw hill series - mcgraw-hill, computer

Mcgraw hill series - mcgraw-hill, computer

$25.50
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Systems analysis and design - analysis,

Systems analysis and design - analysis,

$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 - systems,

Computer systems that learn - systems,

$8.94
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Accounting information systems - information,

Accounting information systems - information,

$5.66
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Dos for dummies - for,

Dos for dummies - for,

$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 - essentials,

Essentials systems analysis - essentials,

$7.26
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Fundamentals information - fundamentals, of

Fundamentals information - fundamentals, of

$4.49
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Introduction information - introduction, to

Introduction information - introduction, to

$3.50
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Turtles termites and traffic - termites,,

Turtles termites and traffic - termites,,

$4.46
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Operating systems principles - systems:,

Operating systems principles - systems:,

$17.37
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Fundamentals information - fundamentals, of

Fundamentals information - fundamentals, of

$26.80
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How linux works - how, what

How linux works - how, what

$7.29
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Essentials mis paperback - essentials, of

Essentials mis paperback - essentials, of

$6.72
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Computer systems a - computer,

Computer systems a - computer,

$45.50
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Gaming sound bar hifi - bar,,

Gaming sound bar hifi - bar,,

$20.99
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Unix systems programming comm - unix, programming:

Unix systems programming comm - unix, programming:

$5.72
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The non designer - non-designer's, design

The non designer - non-designer's, design

$3.88
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Dell optiplex 780 sff core2duo - 780,

Dell optiplex 780 sff core2duo - 780,

$99.99
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Compaq elite 8000 - elite, usdt

Compaq elite 8000 - elite, usdt

$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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