it's part of the reason I rarely have ever bought any used games from the Amazon marketplace. I don't know if there is some disconnect or if people on their genuinely believe their prices, but I've never consistently seen so much overpriced shit as I have there. I see it on ebay too, but rarely for more than 20% of what the game goes with via Buy it Now.
I thought a lot about why people do this, and while ignorance is certainly a factor for some of these outlandish prices, I think most of the time it boils down to people just wanting top dollar for their stuff, which I can understand. However, when some moron prices something for double, triple or more I seriously have to question their intelligence, morals or both.