I have bought several online, here are some good tips.
1. Pick up the phone and call the guy, listen carefully to what he says.
2. Ask alot of questions. Ask for references, NRA condition, 3 day return policy, where is
he located. You get the idea.
3. Always pay with traceable Cashier's check that has his name printed on it.
4. Ask about shipping insurance.
5. Once you know his location, ask if you can pick up the firearm, he has no idea where
you are calling from.
6. You get the idea, the more info. the better.

Tom