I peruse a few forums and whatnot on the interwebs. I'm really only active on this one, but I do read others like reddit and NA.
Very, very rarely do I see someone admit to paying full price for games. I've never bought an expensive (>$50) game at full market value other than new stuff (that I can think of)*.
How are the prices of these things going up if folks are all buying stuff for $1 at thrift stores? Someone has to buying stuff off of eBay, or all these resellers would be out of business.
*Disclaimer: I didn't buy Earthbound, but I have a suspision that it was bought at full price by my wife.