Jon wrote:
Car owners manuals often get out in the house and people trade cars often on impulse and don’t bother to be diligent about returning its parts to the cars. Even the spare sets of keys which in this day and age are quite pricey to replace since most are now just remotes or remote key combination devices. Then on a future clean out they are found and thrown away because the car is long gone.
I reply:
I have two owners manuals from previous cars. One was a duplicate, which I saw no reason to leave with the car, and the other I kept for somewhat sentimental reasons when I donated the car to my local public radio station.
As for remotes, most of the used cars I've bought in recent years have, at most, had only one remote, if any at all. There's enough of a market for second-hand remotes that they often get sold off separately. Pairing a remote to a car is often a pretty easy task although some cars do require the use of a scan tool.