When in doubt about a firearm, if you can get the sn, call any local agency, they will run the sn right then. If it comes back stolen, just give them the info on the seller. Tell them upfront that you are looking to buy from an individual. Always do a bill of sale, regardless if your the buyer or seller. There are several templates online, I found one in PDF format that you put what you know and print it out, both parties sign with at least the name & phone # (you got that from the initial contact), at least if the ATF comes looking, you can say...hey, I sold that to so & so. Then they move on.
