Ickle had a good idea (one of those rare moments) and thought a stickied thread where people post the Steam coupons they want to give away would be nice. So i'll make it, and i will ask everyone who wants to give a coupon away to leave a comment here mentioning:
1. The game the coupon is for
2. The amount of the game's price that the coupon deducts
3. Expiration date for the coupon
The thread became too cluttered and it was cumbersome to browse for coupons, so i took some time and cleared all the replies that didn't include a valid coupon. Now that we have PM's, communication is easier so you don't have to leave a link with your Steam ID anymore.