A couple of the models that I have.
A little background: https://en.m.wikipedia.org/wiki/BMW_Art_Car

Posted about this last week, but MJ's 1991 BMW 850i has been up for auction on Bring a Trailer. The auction just closed, and the car sold for $108,723. ($23!)

Hard to find direct comps given mileage, condition, etc., but from my POV it's pretty clear the MJ provenance played a major role here. Similar cars seem to sell for less than half this number.

Pretty cool collectible for an MJ fan!

Auction listing here:
https://bringatrailer.com/listing/1991-bmw-850i-178/

Original Mantel post here:
https://stg.onmantel.com/post/b7695b02-f309-4952-8927-694ded8ed54f

Bring a Trailer has an auction going now for a 6-series BMW Michael Jordan drove in the early 90s. The car comes with documentation that includes MJ's signature, and a pretty badass license plate.
Maybe not as cool as a game-worn jersey from his 1991-92 championship run... but 'pre-game driven' is still pretty awesome.