You did the right thing. Either could have been a sting.
The first one would have creeped me out too, but the CCW holder might just be a case of a poorly informed, "old-timer". Before July 1, 2013 private party sales without a BGC were not unheard of. In some close circles, they were common.... It was the responsibility of the seller to ensure the buyer was eligible. If the buyer was not eligible, it could easily constitute a felony by the seller and all the legal consequences that come with a felony. The easiest, most common way to ensure your buyer was eligible was to verify they had a CCW and were a resident of your state... Some would be fine just seeing a CODL to ensure it wasn't across state lines. So while ignorance of the law is no defense, I don't necessarily hold it against offer number 2 in the same regard as the immature, ill prepared buyer number 1.