I think he tried to scam me but I'm not sure:)) He didn't provide the purchase code. If you provide it and I can check if it works I will send the bitcoin first. Or we can use escrow.
You can use escrow even before verifying the purchase code as you won't lose anything. If the OP is lying about buying the theme, then it's his loss of reputation. Just look out for a reputed escrow who can clear the confusion.