I'm a collector, but unlike you I have them on my shelves for easy access when I actually do want to play them. Unless you're going to use the money for something or are short of cash, I really don't see the point in selling them. You'll just feel bad afterwards. I thought about selling some of my games, but I know I'll be sad afterwards...
I have over 100 PS2 games but I've only finished bout 15 of them. Just makes me feel good at the end of the day lol. And that to me is worth it, even if someone else doesn't think so.







