Glorb has somewhat of a point. I don't make enough money to constantly buy new games new, and instead of saving up for one, I'd rather get two or three used games for the price of that new game. Also, yeah, if the used game industry is so horrible and is supposedly crushing the gaming industry, why haven't we seen a drop in game production yet? And if, eventually, the gaming industry does fall under due to used games (not likely), to put it bluntly, who cares? Video games shouldn't be your life, it should be a hobby, and if they stop making them, you still have the ones you bought previously. Keeping as much money as I can is more important to me than the gaming industry collapsing, because money can buy a lot of things, whereas games only keep me entertained for a while.
An exception to my always-buying-used-games style is DS and GBA games, but only because 1) they never have any good used DS and GBA games, and 2) used DS and GBA (but mostly DS) games tend to be only like, 5 bucks cheaper.