Separate names with a comma.
It also looks like he's changed his name and is now trade banned.
Here is the screen shot of being unable to add him.
not at the end, i was pissed off and closed steam, the chat ended right after the last screenshot tho, he went offline and that was all
Info of scammer:
| steamname: Trinity
| steam3ID: [U:1:124574634]
| steamID32: STEAM_0:0:62287317