Agree. I just think it would be nice to buy a used vehicle for once from somebody who gives you both (or more) keys and the manual. The feller I sold the Guzzi to got :
Four Keys
The owners manual
The shop manual
Computer (windows) program (Memory stick) for getting into the bike's brain box to reset error codes and read codes.
The right wires and hook-up plugs to connect computer to bikes brain.
Extra keys to the side cases w/extra locks .
Plus 3 extra barrels (keys like the side bags) for a top-box or whatever he might want to add in the future. ?
Then he ask me to test drive it for him ???

???
He never drove a bike before , but was signed-up for a Motorcycle safety class ... so I idled it around the yard for him

, and offered to pay for 1/2 the cost of the Safety class - he said thanks anyway.
Last thing I told him was to be SAFE .