Pending Report: 76561198079085154 - ([TF2] Team Fortress 2 Items)

Scam Report

Report Type: [Money] PayPal scam or scam attempt
Virtual item type involved: [TF2] Team Fortress 2 Items

Accused profile: 76561198079085154

Victim profile: 76561198052223070

What happened? Description:

The deal was 30 keys for $52,8. After I sent all the information and keys, user came up with different excuses so he wouldn't get reported. In the meanwhile he was trading with other user for 70 keys. Once he got both and in check, he changed his name and went completely private on his Steam account. Unfortunately, he did not send the payment neither to me or the other user. According to my search, right after he got 100 keys at total from both of us, he sold them for cash.
Despite my feeling something might not be okay, I went forward and risked it, as this user seemed very reputable - according to his rep threads:
http://tf2-trader.com/index.php?topic=27345.105
http://forums.sourceop.com/threads/151837-Got-Cards-Rep-Thread!?highlight

I did not expect this user to act fraudulently because of his reputation.

Cash trading is as if you are opening crates. You never know what do you get, haha ​

Provide Evidence:

Evidence is shown in the pictures below.
Sent and unfortunately did not receive.​