He likely just told you he was a FFL so you would know he could do transfers for you. Likely charges a very small fee for it.
Lots of gun guys order guns online, but have to use a local FFL to accept the shipped gun, at which point you fill out a 4473 like you are buying it from them. Only you have already paid the online seller, and you just pay the FFL their fee, which varies from one to another. I have seen from $15 to $50 per transfer. (not per gun)
For example I bought a Ruger 10-22 break-down edition from Palmetto State Armory (good prices usually). I paid them for it, then had them ship it to a local FFL. Then I filled out the 4473 at my local FFL, paid his fee, then got my already paid for gun.
Selling to individuals is sooo much easier (and sometimes a better deal). As long as the seller has no reason to believe the buyer is a felon, etc., the seller can legally sell it to them.
And on the other end of that, if the seller knows, for some reason, the buyer is illegal to posses a firearm, buyer and seller can get in a lot of trouble.
Never had to at my go to shop in Wills Point. Never left one overnight though, they may have a different procedure then. They always get to me right away and I am in and out in an hour most of the time. Little stuff like trigger work, sights and diagnosing of a problem once with a gas block.