Just a thought....
With private sales you don't know where that gun is going to end up and if it is going to be used in a crime. If the police show up on your doorstep and you don't have any paper work...good luck. Of course if the pistol was from an estate sale or handed down and the original owner is dead you probably don't have anything to worry about . Although, having an FFL, I usually recommend that a person who wants to sell a gun come in and let me register it in my books and run the 4473 on the buyer...no fuss and legal documentation to "CYA!!!"
Barry
PS:
Most FFLs on OSA only charge $10...small price for piece of mind.
BJG
As long as you sell it privately within the prescribed laws and you did not knowingly sell it to a felon you have nothing to worry about....no paper work needed. Please cite a case where someone who sold a gun privately within the laws got into trouble. I could cite several cases where a gun was sold privately (no paperwork) and then used in crime and there was no problems for the seller.