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It was free, but it did activate on the profile from which it was claimed. So no one could sell or trade it.
Give the poor man the link to the trader via Steam if you really want to help ;)
I can't find the original link I found, but these are the ones I found when I went back to searching. Good luck!
http://www.steamtrades.com/trade/aHNCx/h-l4d2-de2k-guns-of-icarus-2k-tl2-2k-more-hb-links
(old)
http://www.steamtrades.com/trade/G0eSI/h-l4d2-bgee-castle-crashers-just-cause-w-tf2-keys-list-inside-offers
http://www.steamtrades.com/trade/G7uEe/h-l4d2-batman-ac-goty-cs-anthology-w-payday-2-or-tf2-keys
done