I don't sell cheap junk guns that a criminal would be willing to pay for anyway so it's not really a concern of mine.
Actually I rarely sell guns anyway. Most times I trade.
Yeah, as I commented above, why is only sellers that need a BOS for protection. Being as there is no effective way for non-LEO to check that a gun has not been stolen, you'd think more buyers would want a BOS.
Case in point:
Athens man gets 7 years in federal prison for drug and gun convictions
The .45-caliber pistol located in the trunk of Kendrick’s vehicle was said by police to have been stolen in Atlanta.
At the time of his arrest, during a phone call to his mother, Kendrick was secretly recorded by Athens-Clarke County police as saying he bought the gun from a stranger and that he planned to resell it at a profit.
ODT flipper? I dunno.