All great points. As far as paper trails. I keep a copy of EVERYTHING:
1. Title
2. Bill of Sale
3. VIN Check
4. Registration (If still in the glovebox)



It may be overkill: But Having the paperwork is much better than NOT having proof of some part of that vehicle transaction- months or years down the road. I heard a story about a guy here that was given a car by a property owner, he had rights as abandoned property.. 2 years after the car went to the crusher he got arrested- apparently some people "saw him take it- steal it" He didn't have proof he was given the car, and it took him $2k to fight it- if he had just kept good records and copies of everything- Bill of sale with "property owners" signature with Drivers License # on it- it would have been open and shut.