I saw a listing for a hard to find rifle (.308) by a private seller. It is well below the price I'm finding from dealers. I've traded emails with the seller and he asked that I send payment via USPS money order and that he'll ship to the FFL Dealer of my choice with a copy of his driver's license. I didn't know it when I reviewed the listing, but he is out of state so we can't do a face to face closing. Has anyone used backpage or similar online classified adds and what's been your experience. Are there any ways to prevent getting ripped off. I suppose I can ask if the guy will accept credit card but I'm assuming that since he's a private seller, he does not.

Thanks.