Close
You're not "giving away" anything, you're trying to sell it. Which is especially amusing since you're trying to sell it for $4.5 while anyone can buy it for $3.99 directly off Steam itself (also using PayPal mind you).
One more thing, close the duplicate thread, it's against the rules!
http://www.steamtrades.com/trade/NNLDC/h-killing-floor-w-45-paypal
http://www.steamtrades.com/trade/rXedI/killing-floorgiving-it-away-for-45-paypal