Do You Own Any Rare Games?

[Ultravolt]

Do you have any rare games in your possession? Rare as in, hard to find or having a high sell price in stores or online.

For me, it's Metroid Prime Trilogy! This game averages around $100-$150 online. I even saw one that was $500! Took a lot of effort just to get it COMPLETE for a good price. I had to bid on eBay many times until I finally landed a good price of $70. 

So, do you own any rare games?

 

EDIT: I also have certain NES and Gamecube games that go for decently high prices online.