OK, Boaz, I buy a gun...sell it to my inbred cousin who uses it the next day to kill somebody.
Is the victim's family grateful that the shooter got a better deal than at the gun shop?
How does your 'gun-sale look away' policy help society?
How many guns can I sell to my idiot cousins and still be a logical legit exemption for background checks?
Thousands of guns are sold out of a mini-mercenary's trunks, to "their cousins", particularly, in States which border States with meaningful gun restrictions.
Each 2nd hand sale dilutes the safety of Americans, and particularly in States who have voted for strict gun controls.
Not surprised that you wont understand that.
...nobody could have anticipated...