[H] Spacechem + Coupons [W] Don't starve cards or CSGO cards or Dota 2 cards

I have spacechem and these coupons:

• 50% Sniper Elite
• 33% Sniper Elite V2
• 33% Sniper Elite Nazi Zombie Army
• 25% Zeno Clash 2
• 25% Stacking
• 25% Triple Town
• 33% Anna Extended Edition
• 50% Surgeon Simulator 2013
• 50% Crusader Kings 2
• 50% Tropico 4
• 66% Sins of a Solar Empire: Trinity
• 50% Duke Nukem 3D Megaton Edition
• 75% Serious Sam 3