Uh, yeah?
I don't buy used games because they are a huge rip off. Since off a £40 game the retailer takes about half, when I then see a used game being sold for £40, just because it's a new game, I know that the retailer is charging me twice what they would normally earn, which is just a rip off.
So yeah, since I only buy either over XBox Live or new games. This would never be a deal breaker.
Oh, and your poll is very confusing, you need to make it clearer which option is in support and which against.