Attention with this guy is a scammer !
I found him on Steam Trading Cards Group and i contacted him for a game key that he have listed in his thread.

https://imgupload.io/image/Gtdpu
https://imgupload.io/image/Gtxk2
https://imgupload.io/image/G1XeZ
https://imgupload.io/image/GtYSI

-REP

Of course this man is a scammer, but i want to trust him for some reason. Sent him a 50E steam gift code for two games, fifa 21 and RDR2 and, what a surprise, the code is already been reedemed. Good acting by the way, first of all he wrote me day after day, trying to convince to buy from him, he even offered me a discount, buy two games and the price will be lower! Anyway, i trusted him, sent the code that seems to be already been reedemed, so the second part of the acting is on: "i'm not the scammer, you tried to scam me with a already reedemed steam gift card". What to tell more, we have here a man that have the courage to scam ppl on Christmas's day. Stay apart from him , who knows what is capable to do for money. Here's the screenshot:
http://prnt.sc/w9xr74;
http://prnt.sc/w9xrf3;
http://prnt.sc/w9xrjz;
http://prnt.sc/w9xrop;
http://prnt.sc/w9xrto;
http://prnt.sc/w9xry6;
http://prnt.sc/w9xs2v;
http://prnt.sc/w9xs72;
http://prnt.sc/w9xsiy;
http://prnt.sc/w9xsnm;
http://prnt.sc/w9xsrv;
http://prnt.sc/w9xsvs;
http://prnt.sc/w9xt0l;
http://prnt.sc/w9xt58;
http://prnt.sc/w9xt9o

STOP TRADING WITH THIS SCAMMER !!!

even steam trades shouldnt be done with him, people like him should be banished from community itself...

cant wait for your -rep... :)

I'm really glad that you felt the scammed guy feels
maybe someday you will wake up and take your decide to stop scamming other users I doubt

-Rep alt account for that known scammer https://www.steamtrades.com/user/76561198376162052

Scammer Alt Account

Edit= You showed no proofs that your account was hacked.This is a new trend between scammers,to act like they were hacked.But you still the same piece of shit.

https://www.steamtrades.com/user/76561198376162052

https://www.facebook.com/photo.php?fbid=440137256324843&set=ecnf.100009857160913&type=3&theater

Known scammer who attempted to trade me a fake Just Cause 3 key until I checked his reputation and noticed his dark past. He has scammed dozens of other users, luckily I didnt fall into his trap. He will claim that I took his Just Cause 3 key but his key is a duplicate.

Chat log: https://imgur.com/NeZu2HR

Proof: https://www.steamtrades.com/user/76561198411786097#hiMjg

DO NOT TRADE WITH THIS USER! He uses multiple accounts to scam users. I have already reported his profiles to Steam Support.

See here:
https://www.steamtrades.com/user/76561198376162052/search?rating=negative

These are the same user.

Notice the profile name history: https://i.imgur.com/SfIW3ec.png

Edit 3:
He sold his main account to his friend and they did the scam together
This is the current owner of the main account:
https://www.facebook.com/smn13122 (He left a link to his FB on his steam profile: http://steamcommunity.com/profiles/76561198376162052)
You can see that they are friends on facebook: https://i.imgur.com/RWWlm2n.png

This account is a smurf to this scammer:
https://www.steamtrades.com/user/76561198376162052#KsoTa
https://www.facebook.com/DzenaNNN1921

He activated 4 games on this account that he stole from AquaChaos(https://www.steamtrades.com/user/76561198376162052#HNZhR). Two of them are Dawn of War III and The Long Dark. He was using his main for the scam so it's 100% the same person.
https://imgur.com/a/yyciG
https://i.imgur.com/GSDgIQA.jpg
http://oi64.tinypic.com/290y8lw.jpg

They no longer show up cause the user contacted Humble support and they deactivated the codes:
https://www.steamtrades.com/trade/UzI8t/h-the-long-dark-tomb-raider-owlboy-more-w-keys-offers-list#hD3LYkr

Those are his other accounts:
http://steamcommunity.com/id/De_Ba_Sta_Ti_Je/
http://steamcommunity.com/profiles/76561198140143260

Edit:
It's the same guy:
1) The scammer from the first link is called "Dzenan1921" on steamtrades
2) This kid here has posted his "official email" on steam which is "dzenaNNN1921@gmail.com"
https://i.imgur.com/SWenY0P.png

It has been brought to my attention that he has the same name history on both accounts :
https://i.imgur.com/SfIW3ec.png
https://i.imgur.com/WfEQ8ab.png

Edit 2:
He claims that his "main" account was hacked (he replied to this negative that he doesn't even know that other account so his story even changed):
https://www.steamtrades.com/trade/0fPr1/h-idling-service-w-games#JLVvl5F
But he keeps activating the game codes he scams with his main (https://www.steamtrades.com/user/76561198376162052#KsoTa) to this account.