The dude who scammed OP is a clown. Abandoned his account for a measly $325, hasn't logged on since. Can't trust anyone on this forum nowadays without escrow no matter how "legendary" they are
I think it hasn't been long enough to say that he abandoned his account.
I am also not sure how Vanilla works or if when you receive funds via vanilla the email address of the sender will be shown. If so then it is possible that he saw who he was trading with and decided to scam him