Hello, my University was disposing of some test equipment from an old electronics lab and I decided to take it home to see if I could use any of it. I have been able to complete the basic calibration and self testing and so far they appear to have no problems but most of the equipment is benchtop I don't have space or use for such high end equipment as a hobbyist / student and am looking to sell if possible. I have an HP 3458A, 81101A, and 3245A which all seem to be listed for a lot on ebay but are mostly from actual stores with reputation and certification. If i were to make a listing, would ebay be the best bet or is there a better option for small sellers? Also would it be worth it to try and send these in to a calibration lab to get them certified or is the self test (and the rest of the recommended tests in the manual if required) enough to be trusted online? Lastly, there are quite a few threads about people complaining about even big sellers lacking critical information or answers to specific questions about the product, especially with the 3458a, is there some basic information that I should include or have the answers to or should i just be combing through these threads and learning about common issues to see if my model has them? Any help would be appreciated, I am very new to the test equipment game and not sure what is typical for something like this.