I've seen some of the stuff that the vintagecomputermuseum has sold on eBay when stuff has been shipped to me for repair after people bought into his ads. I don't he/they is/are as uneducated about the stuff that they are selling as they claim to be.
Everything they I have seen that has come from there is not very original, it's rigged and it's usually inoperable old junk. People have paid me thousands of dollars to make repairs, and restore stuff after buying from him/them. Once, I tried to ask some questions, and rather than answer me, he blocked me. If you ask detailed questions, question his description of an item/items, and try to tell him that what he sold you is not what he described in his ad, he blocks you.
Yet, while he blocked me from bidding on his items, and ignored my questions about what he was selling, several times he/they tried to bid and buy S-100 stuff that I put up for auction on eBay. The stuff I was selling was non-working experimenter only grade Compupro boards and odds and ends from other S-100 manufacturers that I acquired that was modified or not working that I felt was not the same quality as the stuff that I normally sell through my business. I did not want the stuff resurfacing for sale, misrepresented as working, or condition unknown and sold to unsuspecting S-100 Collectors and Users. I removed his bids for my items several times, and after he/they continued to bid on my items when I repeatedly told him I didn't not want his business, I had to put him on my Blocked Bidder List to end his attempts to buy my stuff anyway.
I'm not jealous of him/them, I'm mad that he can get away with misleading people and get inflated prices for junk, they he/they represent as "found" or untested and original, when it's often tested, thrown together unmatched odds and ends, and junk. I have nothing against him/them making AN HONEST LIVING, FAIRLY AND HONESTLY describing what he is selling. But that's not what he's about.