Before anyone here makes a trade, I'd like to inform you that no trader uses prices directly from Steam. For your own benefit, I'd encourage you to see the prices of the same games on Gamivo.com, Eneba.com and Kinguin.net.
Here are the actual prices of the games you have listed:
Back to Bed - €0.29
Blackguards - €0.32
Brutal Legend - €0.50
Canyon Capers - €0.40
Cultures - 8th Wonder of the World - €0.32
Fantasy Wars - €0.49
KnightShift - €0.12
Lego The Hobbit - €1.00
Medieval Shopkeeper Simulator - €0.88
Millennium 2 - Take Me Higher - €0.91
Red Bow - €1.99
Shining Plume 2 - € 0.68
Theatre of War 2: Kursk 1943 - €0.33
The Watchmaker - €0.23
Yokus Island Express - €0.36
Remember that, unless the game is rather new, there will always be other places to buy the game, where it is much cheaper than Steam, and those places are exactly where traders determine their products' value.
Good luck!
Steam Keys with nearly the same value (search on Gamivo.com, Eneba.com or Kinguin.net)
Prices are frome Gamivo.com, Eneba.com and Kinguin.net.