This person is definitely a dirty CD-key scammer and cheater. He has another Steam account:
https://steamcommunity.com/profiles/76561198171309301
https://steamcommunity.com/profiles/76561198026502947
As everyone scammed by this person before says, his deceit can be divided into two steps:
1. First, try to make some successful trades with you for winning your trust.
2. Then, he will ask you to send many valuable CD keys and pretend to have a plan for sending you his keys later. After receiving your keys, he will try to prolong the due as much as possible.
3. Until he finds your patience is out, he will ignore your messages.
Try to keep away from such people. I will post the screenshots as my witness in the following link.
https://user-images.githubusercontent.com/32186723/190836343-af6d4453-9b39-4cb3-9cb3-69f4007ed570.png
Grid autosport
Dirt rally 2.0
Besiege
Bloodstained: Ritual of the Night
Dead rising 3
Dead by Daylight
Building Simulator
Train simulator 2021
A Plague Tale: Innocence
Cities skylines
2 * Battlestar Galactica Deadlock - The Broken Alliance
Construction Simulator 2015 Deluxe
Everspace
Generation Zero
Assetto Corsa Ultimate Edition
此人只向我兑现了:
Close Combat
Last Day of June
Final Fantasy VIII