I don't regret it per say, but I spent over $100 on a 8gb PSP memory card. Also I just learned my PSP battery is busted and bulgingSelling games is a good shout actually. I used to often sell games and then a few months later really want to play them again but I couldn't. I don't think I'd regret it though, since back then selling games was the only way I could afford new ones, so it was probably worth it.
Biggest regret is selling games. I never sold games ever but one time when I was getting older my siblings and I thought it'd be a good idea to try it. Sold Wii Music which I don't regret, but I also sold an unopened copy of Killzone 3 and got like $10. My heart sank when we asked the store employee how much money we'd get and he just ripped the cellophane off the game. BTW this was the same month the game released and was Best Buy.
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