Is the bill of sale required for anything? Does the signed over title do the same thing?
Just like in private firearms sales, I'm not much for unnecessary documentation.
Legally, the signed title is all the BMV cares about....sometimes. Other times, they'll ask for that, a bill of sale, your firstborn's blood type and verification of circumcision. Seems to be random.
For me, since the state has iron-clad documentary evidence (computer searchable) that I owned the vehicle, i want evidence that it's no longer mine should the person I sell it to use it for mopery.
Since I don't believe in selling guns (reduce my stockpile...i think not!) I haven't had occasion to deal with that...though I think I would want the same thing- evidence that it isn't mine anymore. I'm into protecting myself, not the buyer.