Just was wandering around Amazon, and saw Supreme Commander 2 on discount at $5.99 USD as compared with Amazon and Steam's usual price of $14.99.
Supreme Commander 2 is also on the list of retail games able to be activated through Steam.
It's a fairly decent RTS on an epic scale (you can have hundreds of units at a time) and worth a shot if you like this sort of game.
Edit: Forgot to mention that you needed to fake a US address, as Feepitee has said below.
Shouldn't be a problem as the key is delivered via email!
GG
Downloading: Currently, this item is available only to customers located in the United States and who have a U.S. billing address.
So I would say that we will have difficulty in getting it.