Get'm while they're low!

[Chesspiece_face]

I have exactly $4.10 to spend on a game, but I'm not sure what to get. I was hoping for Bioshock to be that cheap, but it isn't. What should I buy? Should I just wait until the final day of the sale?

Also, I have Portal + Portal 2 that I bought last summer to give as a gift to someone, but I never gave it to them so it's still sitting there unused (I already have both games). Do any lurkers have any steam gift games they might want to trade for them?

I don't need Portal or Portal 2, but if you are interested in Terraria I have a copy of that sitting in my inventory collecting dust you can have.