Refurbished IBM Mainframes

Buy, Sell, Lease and Maintain IBM Z.


Need to find a mainframe part fast?
Call us: +1(952) 448-9922
M-Fr, 9am-5pm CST

Sell & Consign

We purchase used mainframes, and have an optional consignment program to help you recover costs and space.

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Service and maintenance for IBM Z series, SystemZ, zEnterprise and Z mainframes.

Contractor and workforce screening by
eVerifile and eRailsafe.

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Benefits of buying used mainframes

Every mainframe we sell is refurbished to IBM specifications, providing your business with a reliable system at a significant savings over buying new.

According to ASCDI, purchasing secondary equipment can see savings of up to 85%.

Our services cover the entire life of your mainframe system, including custom I/O configurations, installation and maintenance. We can also help liquidate your assets through purchase, trade-in or consignment to help recover costs.

The end-to-end solutions we provide will keep your system running smoothly and improve your bottom line.

industry compliance

Working with the best to give you the best.

customer trust

Earned through value delivered.


  • “We’ve been using Simon Systems for 10 years because, from start to finish, they provide superior customer service. They’ve never hesitated to go the extra mile to insure project success and we receive incredible in-depth knowledge from every team member, every time. It’s always a pleasure working with them!”

    Jeff S.

  • “…worked closely with Simon Systems for more than twenty years concerning its IBM systems… probably the most knowledgeable and approachable people in the computer hardware industry… attention to detail when either purchasing used equipment or refurbishing equipment is the Gold standard.”

    Michael M. 
    Data Center Manager

  • “Through the years they’ve sucessfully provided a variety of services…Simon Systems has demonstrated time and again an ability to react quickly to changing needs and be highly flexible.  Through it all, they’ve always been highly professional.”

    Mike P.
    Data Center Manager


Specializing in refurbished IBM mainframes

A worldwide leader

As a worldwide leader, Simon Systems feels very strongly about the value of mainframe computing.  To that end, we have committed one-hundred percent of our resources to the mainframe market.   Service and support is the backbone of Simon Systems’ success.   Every day we explore new and better ways to serve our customers and their needs.

mainframe parts

Simon Systems carries an extensive mainframe parts inventory of thousands of new, used & refurbished features and parts.  All parts are tested before shipment.  We guarantee 100% satisfaction, and competitive pricing on all refurbished IBM z System parts.

Need to match parts to your existing mainframe or server environment?
Request a consultation.

30-day warranty on all parts

No matter where you are in the world, our 30-day warranty guarantees that your features and mainframe parts will arrive in working order. From casters to top exit power, and everything in between. All parts are fully tested by technicians. Secondary mainframes go through a testing process and MSQ recertification.

Questions about our warranty?  Contact us

Simon Systems United Stated Offices

About Simon Systems

We have provided mainframe solutions domestically & internationally for over 30 years.

Simon Systems was incorporated in 1988 as a full service mainframe reseller and maintenance provider.

We are strongly rooted in the global Mainframe Server market, from the earlier IBM 8100 and IBM s370 systems, to the modern IBM zSeries, zEnterprise and IBM system Z.

IBM mainframes are our specialty.  Our inventory and services have benefitted numerous organizations around the world, reducing their IT costs while maintaining a highly reliable system. 

Our corporate office, warehouse and technical center is located in the Minneapolis, MN metro area.

We support the IBM tradition
of mainframe stability.

Mainframe sales increased


year over year*

As technology seems to transform businesses and markets overnight, Information Systems must provide the same flexibility and adaptability as the companies they support. Companies must maximize the strengths of the traditional mainframe stability, manageability and performance — while integrating them into the openness and interoperability of distributed networks.

One of the chief challenges of mainstream client/server implementations, is certainly the integration of client/server with the existing network of systems and applications to better enable communications… Simon Systems has the experience and expertise necessary.

* As reported by Fortune in 2016