So, over the years I've gotten a lot of Steam games while they where on sale for gifts'n'stuff... now I just need to get rid of them! I would like to get their USD/MtGox price, if possible.

Empire: Total War
Rome: Total War Complete Pack
Osmos (fun little indie game)
Orange Box
Bioshock (1)
Serious Sam HD: First Encounter
Civilization IV: Complete Pack (all expansions and Colonization)