I ended up picking up a copy of Panzer Dragoon Orta many years ago with .hack//INFECTION and .hack//MUTATION when EB had a Buy 2, Get 1 Free sale. I didn't actually own an XBox until around a month ago, though, so it mostly sat around yet my brother found some use for it. I also bought Popful Mail the summer before last simply because it was going for $8 on eBay and, hey, Sega CD be damned I can still play it on the computer thanks to emulation.
I think I also picked up some random things here and there, mostly imported PS1 and PS2 games that I may not be able to play not but will be able to eventually. Nothing wrong with that!