Pay for Steam Wallet $$cardcode seller wants rate first. wat do?

So I picked a seller and payed for some wallet codes and 4 hours later I get a message from seller

“hey bro I would be happy to send you the codes, but it would be really nice if you could rate first”

At this point hair is standing on end and eyes are squinting and I’m looking for a report button… what do you guys think?

DO NOT RATE FIRST.

Take screenshots of the seller saying this to you and report them to Gameflip support immediately. That is against the rules. Once you rate your seller, you are saying that you received the item and everything worked. Your transaction will then be concluded and the money will be released into their account.