Bingo! Neither are bills of Sale nor checking id required and neither is going to save you in court...it's a gun and people will assume you should have sold through an FFL who could do a nics check...So in this hypothetical civil suit that no one has ever heard of happening before, but that could possibly happen, what's to stop the prosecuting attorney from convincing these simple people in the jury that I should have gone through an FFL to sell this hypothetical gun to a hypothetical buyer who then used it to hurt someone?
Even though it's not required by law in this state to ask for any proof that the buyer can legally purchase a gun if I am asking for said proof shouldn't I also do my due diligence by transferring the gun through an FFL if 'maybe' something bad could happen?
I understand your concern and for the record I have only bought and sold and traded guns here on the ODT and only with members who had more trades than I and with 100% feedback, so if I did sell to someone who couldn't legally own a gun so did a lot of ODT members, including some in this thread.