Declined Report: 76561198134105703 - ([TF2] Team Fortress 2 Items)

Scam Report

Report Type: [Item Fraud] Quick-switch trade scam or attempt
Virtual item type involved: [TF2] Team Fortress 2 Items

Accused profile: 76561198134105703

Victim profile: 76561198172267683

What happened? Description:

Hello, I cannot upload more than 15 files to this submission. I'm going to submit it and please let me know how I can send more to you guys.

Disclaimer: Drewban and Cos are the same person in these chat logs.
Here is the info block for his Cos account:
| steamname: Cos
| steam3ID: [U:1:1141260743]
| steamID32: STEAM_0:1:570630371
| steamID64: https://steamcommunity.com/profiles/76561199101526471
| customURL: https://steamcommunity.com/id/cosentin0
| steamrep: https://steamrep.com/profiles/76561199101526471

Drewban reached out to me to trade for my Unusual Jolly Jester: North Star Effect. I had listed it on backpack.tf. He offered me 290 keys through this account. On his other account, Cos, he told me that he would buy it for 350 keys.
"Cos" told me that in order to verify that my hat is marketable, he needed me to go on to the website skinsport.com. He told me to put a name tag in the sales queue so I can see how I can confirm that my item is marketable. I put the name tag in the sale queue and he then sent me a trade from a fake skinsport bot account. I traded away my name tag, and then that account traded it back to me.
So, he gained my trust that this was how I could prove it was marketable.
I then did the same thing with my Unusual Jolly Jester, but he didn't give it back. I begged him to give it back, but he said that I would need to give him a bunch of other stuff in my backpack in order to get my item back. So I gave him other stuff in my backpack and then he blocked me. I know that "Cos" and "drewban" are the same person because he confirmed it through other chat messages that he sent me. Hopefully that is enough to prove they are the same person. I am also attaching a screenshot of his listing of my Unusual Jolly Jester on his backpack.tf page. I know for sure they are the same person because he put the listing up almost right after I traded the hat to "Cos." Please let me know if you need more evidence.​

Provide Evidence:

1: proof that this is my chat log View attachment 816419

2: my conversation with drewban, sorry the conversation begins at the bottom and later timestamps mean that it's continuing. So for each screenshot, go to the bottom again to continue the conversation.
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3: my conversation with his alt "Cos"
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