For a modern look at the formal side of these transactions, the University of Wisconsin provides a Used Computer Equipment Sales Agreement template. This document outlines the necessary legal protections, such as "as-is" clauses and liability waivers, essential for institutional sales.
An early entry in the field is found in Computers and Automation (1964) , where the firm J. Kates & Associates is listed as a consultant for buying used computer equipment. This highlights how the second-hand market for computing has existed since the mainframe era. buy used computer equipment
Archives of publications like Computerworld and Computer Shopper Magazine track the boom of the used market during the PC revolution, offering "how-to" guides on evaluating hardware and avoiding common pitfalls like outdated interfaces. Used Computer Equipment Sales Agreement - pdfFiller For a modern look at the formal side