How much can i sell my cpu for?

I just got a brand new cpu, and i was wondering if you could tell me how much i could sell my older cpu for..? It's a Dell...(WOOPDIE DOO XD) A dimension 110/b110...it has a Intel Celeron processor, it's a 2006 i believe....so...any tips would be great :J i mean crud, even if i can only sell it for 20 bux that's something XD