[H] Cards, TF2 Metal, CD-Keys [W] Killing Floor cd-key offers.

Title says all, im open to offers.
A link to my inventory: http://steamcommunity.com/id/76561198002477921/inventory/

Keys:

• Serious Sam HD: The First Encounter Steam Key
• Serious Sam HD: The Second Encounter Steam Key
• Aztaka
• The journey down
• Zen Bound 2