Anyone sell their collection?

[Angrist]

I slowly want to sell off my oldest and most boring games. I have about 20 NES games that I've never liked. Some of them are worth quite some money (Castlevania II Simon's Quest: €15? Sweet).
When I'll sell them, I'll probably try eBay or an alternative.

I also have a lot of Nintendo-developed games that I want to hold on to. I also hope that games like Zelda, Metroid, Kirby will only get more expensive.