Seeing an ordinary purple eraser wizard sell for $20 is what got me. Especially since I own one.. and paid $5 for it out of the PIAS used bin. I have yet to actually win an auction, because I stop bidding once I feel its gotten past what it should be sold for.... but the things that were getting out of hand were the mystery auctions. People werw paying $200+ just in hopes that there would be 1-2 really good discs in there. Then they find out that the mystery proto stamped disc was a Groove or something awesome like that and they get mad cause they just paid $250 for stock plastic they could of picked up for a lot less.. while the seller is just sitting back with a smile
Those mystery auctions were stopped for the reasons you give.
You must have missed that part.