it's a good offer but unfortunately I have Hitman Absolution already so I can't verify if your key works.
Just a word of warning. You can be suspended for revenge negative repping or for lowballing repping. I would remove those if i was you. You are probably right with what you were saying but Steamtrades doesnt allow you to negative rep someone for that reason and i have seen people get suspended for doing that, just letting you know ;)
http://www.steamtrades.com/trade/af3y1/misuse-of-feedback-impersonators-alert
I appreciate your concern. Don't get me wrong. This immature scumbag starting being vulgar and aggressive after I refused his stupidly ridiculous offer of a UK Amazon voucher practically useless to anyone outside UK when I asked for keys.
He neg repped me because I refused to trade. What an absolute scum of the earth.
I think there is somewhere you can post and get false negative rep removed. As it says in the rules though, if you have revenge repped them you can be suspended too. Negative rep is just there to be given for scamming or impersonating. You are in the right so just letting you know, free bump :)
SEE THE PROFILE OF THE TWO JOKERS WHO LOW BALLED AND NEG REPPED ME HERE:
http://www.steamtrades.com/user/Garbener
http://www.steamtrades.com/user/Arteleon