Just to clarify, Jobst is talking about the sealed, high end gaming market. The used copy of Mario Party 3 you are waiting to buy is still $60. The open prices are the ones I care about, because they affect me the most (and I would wager, 99.9% of collectors).
The fact that games are listed with the same exact picture for 90% the price really feels like those first sales were fake by the auction house to drive it up.