Good point. I dont think high street retail would last long without the second hand market.
@Rodney Well most gamers who play lots of titles tend to know that newish used games aren't much cheaper. So I imagine they trade-in more and buy more.
Those who buy exclusively buy older cheaper used games are those with very limited cash who wouldn't buy more than a couple of new games a year regardless.
My understanding from the data I saw was that trade-ins drive new purchases. They also make most of the retailers profit. I've said before that without used games I can't see GAME group surviving long. That would reduce competition and would likely result in prices drifting up a little.