I've only bought one used game that was currently in circulation, but I bought it still in the wrapper from a friend of mine who received two copies for his birthday. I just compensated him for purchasing it for me. There is no doubt that it hurts the industry, but the industry shouldn't (in my opinion) charge $50 a pop. They could sell more games by lowering the price, then could make a lot more money. I'm sure there is a way to model this equation with linear programming, but I'm far too lazy at 10:38 PM.