Me? A lot.
So many reasons to go against a "no used game" system.
1) can't buy games cheaper. Not every game is worth $60.
2) can't sell games. What are we gonna do once we finish a game? Keep it? We can't even lend them to a friend or give them for free to anyone. THAT JUST PLAIN SUCKS. You either keep them or throw them away.
3) what about games that you missed, or you wanna buy down the line? Imagine wanting to play some niche PSX game today and won't be able to play it unless you buy a new, unopened game. O-U-C-H.