Make a sort of sale paper stating that the car was sold as is a both parties have a copy stating that with the amount paid.
is that not on the title in MN?
here buyer and seller sign the back of the title and put how much paid because the buyer mails that in to get the title re-issued with their name on it and pay registration and get plates.
both sign you snap a picture of the title I have a thing to make it a pdf and put it in my online drive.
I also ask to see drivers license and snap a picture of that they wouldn't have to provide it but I was buying last time not selling and the guy was functioning as an agent for his father in law who was not there so I wanted to cover my bases even though I had title in hand and car.