 When you're selling your gun online, your potential buyers might sound safe, but does that mean they really are? Hi, seller. I'm interested in the 9mm you posted. I'd love to get my hands on a gun. In such good condition. Let me know if it's still available. And we can set up a time to meet. An email can't tell you what a licensed dealer can. Sell through a licensed dealer to make sure the buyer checks out. Go to ncpc.org to find out how to sell with certainty. Brought to you by the National Crime Prevention Council, the Bureau of Justice Assistance, and the Ad Council.