Steam Summer Sale
I have a 33% off any Valve game, and 50% off Oddworld: Munch's Oddysee. Both are entirely useless, as Valve games are currently 50% off and O:MO is 75% off.
EDIT: Also, these coupons do not apply to items released after Jan 2, and only apply to items bought between Jan 2 and March 1. They are good for two months.
I hope these crappy coupons become useful someday, cause I'd rather have the coal. If you want them for some reason, I'll trade for one coal, one Portal 2 item, or one TF2 item apart from crates.
If you're interested, I have copies of Killing Floor and Borderlands GOTY (with DLC) for trade.
I'm D1398342003 (Numbers) on steam.