One of the agreed keys was already used but they offered others in exchange. Took a day or two to eventually finish everything.
Wouldn't recommend trading. He listed a copy of Sims 4, turns out he didn't have it for months. He was nice and apologised, promised to took down the ad, HOWEVER later it turned out it was some kind of key activation he tried to REFUND FROM EA.
Let that sink in.
He put up a game for trade that was already activated and he tried to refund (I don't even understand what was the idea there, you don't get back a key from a refund ever).
Also kept me waiting for 3 days not bothering to answer, even when he was online and I messaged him it was 2nd or 3rd attempt (after the 3 days).
I'm not questioning if he is trustworthy, he has almost +600 rep, you can't buy that. But he prooved to be extremely troublesome and could not deliver, which was a huge bummer after keeping me waiting for 3 days. All it takes is 10 seconds to check your messages on your phone's steam client or just not ignore that giant flashing thing on your desktop that says new message.