Wouldn't that be the same amount they used to buy the two keys?
yes
but ill give them a tf2 hat or something plus the money back
Isn't this breaking the ToS or some thing?
buying 200 keys and reselling them at $10 (when you bought them at $5) is breaking the ToS
buying 2 keys and trading someone for $10 + some tf2 hats (when you bought them at $5) is not breaking the ToS