Long story short: I got scammed, it was my fault, I didn't know much about trading. I should've found out that over *) +reps doesn't mean anything at all. Try to avoid this guy and his indentitities, which I've found by digging around for a couple hours.
Long story long: I've received a copy of CS:GO and was happy - I knew it was worth a lot. I went to Steamtrades.com and posted that I've a game to trade. This guy added me to his friends list and offered $80 worth of games. He would buy them, but since he hasn't bought a game for himself for a long time, he couldn't buy gifts to his Steam inventory, so I had to go first. I checked his profile, he had over 80 +reps, some even from reputable people, so I thought - "well, perhaps I can trust this guy, even though that'd violate my 'don't trust nobody' policy", and I agreed. Shortly after I traded him the copy of CS:GO, he blocked me. After I've passed him a message that I'm giving him 16 hours to come to his senses, he changed his profile link and avatar. Unfortunately for him, that isn't enough to hide your identity if the one who got scammed is motivated.
So here's everything what a motivated guy can dig up in 8 hours of digging:
All of what I dug up can be proven by a huge wall of text with what I did and many links to various places, as well as screenshots in case those links would get removed.
Extra comment: Quite a few people told me that lately the Steam community is getting filled by a lot of scammers... Some of even quit trading, after being one of the first traders. As one of them said "the trading community is rotting" - I guess it's turning into a casual F2P MMORPG community, one of those where nobody speaks English...
Hopefully I helped someone to avoid this guy. :P
EDIT: After posting it around the net, a user has reported that his account at SPUF messaged him with the following Steam account, so it might be another alternate account of his: http://steamrep.com/profiles/76561198057558135
Long story short: I got scammed, it was my fault, I didn't know much about trading. I should've found out that over *) +reps doesn't mean anything at all. Try to avoid this guy and his indentitities, which I've found by digging around for a couple hours.
Long story long: I've received a copy of CS:GO and was happy - I knew it was worth a lot. I went to Steamtrades.com and posted that I've a game to trade. This guy added me to his friends list and offered $80 worth of games. He would buy them, but since he hasn't bought a game for himself for a long time, he couldn't buy gifts to his Steam inventory, so I had to go first. I checked his profile, he had over 80 +reps, some even from reputable people, so I thought - "well, perhaps I can trust this guy, even though that'd violate my 'don't trust nobody' policy", and I agreed. Shortly after I traded him the copy of CS:GO, he blocked me. After I've passed him a message that I'm giving him 16 hours to come to his senses, he changed his profile link and avatar. Unfortunately for him, that isn't enough to hide your identity if the one who got scammed is motivated.
So here's everything what a motivated guy can dig up in 8 hours of digging:
A video proving that I'm not lying: http://www.youtube.com/watch?v=EB-TNqzuXX0
Account who scammed me: http://steamrep.com/profiles/76561198059163300
His main account: http://steamrep.com/profiles/76561198025857192
His alternate account: http://steamrep.com/profiles/76561198057287700
His alternate... main(?) account: http://steamrep.com/profiles/76561198012643837
His alternate Steamtrades.com profile: http://www.steamtrades.com/user/Munze
His main Steamtrades.com profile: http://www.steamtrades.com/user/OnlymeME
His alternate... main(?) Steamtrades.com profile: http://www.steamtrades.com/user/BigBoy
The account who scammed me doesn't have a Steamtrades.com profile, as he doesn't meet the requirements...
His SPUF account: http://forums.steampowered.com/forums/member.php?u=1205163
His Playdota.com profile: http://www.playdota.com/forums/member.php?u=90392453
All of what I dug up can be proven by a huge wall of text with what I did and many links to various places, as well as screenshots in case those links would get removed.
Extra comment: Quite a few people told me that lately the Steam community is getting filled by a lot of scammers... Some of even quit trading, after being one of the first traders. As one of them said "the trading community is rotting" - I guess it's turning into a casual F2P MMORPG community, one of those where nobody speaks English...
Hopefully I helped someone to avoid this guy. :P
EDIT: After posting it around the net, a user has reported that his account at SPUF messaged him with the following Steam account, so it might be another alternate account of his: http://steamrep.com/profiles/76561198057558135