I am trading these coupons for crystal energy or tf2 items. The price of the games on steam is in parenthesis so you can gauge the amount you will save with the coupons.

50% off Sam and Max Complete Pack (Currently 33.49, but sale ends before coupon is valid, so it's price will be 49.99 when coupon is valid)
25% off Batman: Arkham city (Current price 49.99)
50% off DOOM 3 (Sale price 9.99)
25% off Lord of the Rings: War in the North (Current price 49.99)
25% off Bitcomposer titles (Prices range from 2.49-9.99)
50% off Valve
33% off Valve

Hopefully you see something you want. Offer here or add me on steam. http://steamcommunity.com/profiles/76561197995250254/