well, i buy alot of games, but i have never bought one at full price
i always wait for them to come down to 1/3 the price or lower and then buy them

the few times i've bought stuff at full price (L4D2 and Skyrim) i've sold something to get them
in the case of L4D2 i sold Google Wave invites on ebay and Skyrim I sold TF2 hats