I am telling anyone dealing with you or you dealing with anyone else to use an escrow service. Neither of you have any trust at all, so anyone trading with you should use escrow and if anyone else tries to get you to send first who doesnt have a ton of trust you had better us escrow.
I recommend John K
John K is the most trusted no doubt about but there are a few more options such as DannyHamilton, Darkjuggalo, and a few others with positive feedback for escrow.