Traded Bloodsport.TV key with this person. Key got removed in 2 days. Turns out it was free beta that is got expired.
When I contacted him about it, he blocked me on Steam. Now he left me negative rep, pretending that he doesn't know anything.
Will remove this when/if you give back my Terreria gift.

Scam attempt, offering free beta keys for gifts.

Proof http://imgur.com/jpWI2S5

Scamming people, if fails, leaves negative feedback with BS arguments and no proof

He traded me a copy of Bloodsport Tv with no mention of it being a beta key. When I redeemed the key and questioned him about the redemption giving me a beta marked game he assured me that the developers would be updating the beta keys to full versions later on. Now that the game has officially released, the beta key was removed from my account and the official game is no where to be seen. He deleted his comment from my trade topic, removed his positive rep, removed me as a friend and refuses to re accept me to make the situation right. I will leave this negative rep on his profile until he accepts my friends request and we reach an agreement on what would make the situation right. I'd implore anyone who see's this to be very cautious of entering into any trade with Athanh8807....

-rep, sold me Bloodsports.TV which got removed from my account a week later. I will remove the negative when you contact me and give me something instead.
Dont waste your account because of 25 cent, I am the second guy now who -rep´d you for Bloodsports.TV.

Until this case is resolved: Beware of this trader.

Edit: Today I also got blacklisted by athanh8807. Very mature.

WARNING: This guy trades free beta keys from sites. Check his threads, they are filled with games that could be obtained for free!!

I myself traded for the game "Bloodsports.TV", only to find out ½ hour later that beta keys for the game is being given away for free (either via curse.com or from the developer). This athanh8807 guy told me this: "ATHANH: yes, it's become full version when it official release, evidence is u can get cards now :)"
... So not only did he not tell about the key was actually a beta key that he got for free, but also that the game would disappear from our libraries when the beta/early access ended (which it did a week after I traded with him).
Afterwards when I confronted him with the facts, he simply just said: "ATHANH: really? I dont know, I got a extra key when send email to developer to invite beta test" ... He obviously did not tell that right away because then no one would trade with him + it was not just an extra key. It was MANY. I checked the people who gave him +rep afterwards via their sg profiles, and they traded for "Bloodsports.TV" aswell. Oh, and this guy also deleted me from steam, deleted his comments on my trading thread, AND his +rep on my feedback -.-

Avoid this scamming dude at all cost!! -rep