I have a bunch of extra steam keys from bundles I purchased and already owned some of the games.
I'm selling them for TF2 items, other games and offers. These are all steam keys and therefore can not be traded through steam trade, so one person will have to go first.
You can check my Profile and see the amount of rep I have there and my steam rep to verify I'm not a scammer, here is a link to the page I have sold items for Paypal with happy customers, so unless you have good rep, I'll expect you to go first.

Games

Bioshock - 2 keys

Bioshock 2 -2 keys

Dota 2 - 0.33 ref

Trine - 3 ref

Cogs - 0.55 ref

Swords and Soldiers - 1.11 ref/craft hat

Zen Bound 2 - 0.66 ref

Swords and Sworcery - 1 ref

Metro 2033 - 1.55 ref

Men of War - 1 ref

Sonic Adventure DX - 1 key + 0.66 ref

Titan Quest - 1 ref

Warhammer 40,000: Dawn of War - 1 ref

Darksiders - 2 ref

The Basement Collection - 1.22 ref/ craft hat

Cave Story + - 1.22 ref/ craft hat

Offspring Fling - 0.66 ref

The Bindings of Isaac + DLC - 1.22 ref/ craft hat

Closure - 1 ref

Shank 2 - 1.33 ref/ craft hat

Snapshot - 1 ref

Bundles

SEGA Genesis Classics 3 includes: Alien Storm, Bio-Hazard Battle, Columns 3, Decap Attack, Ecco: The Tides of Time, ESWAT: City Under Siege, Flicky, Golden Axe 2, Sword of Vermillion, Virtual Fighter 2 - 1 key + 0.66 ref

SEGA Genesis Classics 4 includes: Alien Soldier, Gunstar Heros, Landstalker: The Treasures of King Nole, Light Crusader, Shining Force, Shining Force 2, Shining in the Darkness, Streets of Rage, Streets of Rage 2, Wonder Boy 3: Monster Lair - 1 key + 0.66 ref

Darksiders, Red Faction: Armageddon, Metro 2033, Company of Heros, Company of Heros: Opposing Fronts, Company of Heros: Tales of Valor + Red Faction Path of War DLC - 1 key + 0.33 ref

I will do deals for multiple keys and I accept most TF2 items(They just have to be close to the value of the prices)