You ever think maybe people don’t wanta give a stranger their info.. or we’ll maybe your right
LGS owner told me to always get a basic bill of sale with the serial number and driver license info and both the buyer and seller sign . Buyer gets the original and seller gets the copy. This so you are able to point law enforcement in the direction the gun went if they ever knock on your door because you were the original buyer from the LGS. The original paperwork the LGS did is the only record on file.
Now if I am selling a gun that I did not buy from the LGS and no paperwork or BOS has my name or info on it , I would have no problem selling a Glock for $ 850 to someone with no paperwork or ID involved.