SurplusEQ usually has a variety of power supplies in stock for electronic testing, although our stock changes on a daily basis. We carry quality brand-name used function generators and affordable new brand and off-brand models. Troubleshoot electronic equipment, inject signals, test or validate circuits, and characterize electronic devices, development, testing, and repairing electronic equipment. SurplusEQ.com buys, sells and trades a wide range of high-tech equipment and excess inventory used in the high-tech industry, including power supplies. Get cash for your surplus or unneeded high-tech equipment, or trade for anything we sell.