there's meant to be a black RS500 near me, and the only miles its ever done are from the dealer to where it is now, is in dry heated storage, on axle stands, D40's removed from the rims and stored so they do not dry out and crack up, and the rims are in the boot of the car.
only know of it, as my pal worked for local dealer, and they went up to service her every year, ensure it was running correctly, but has never turned a wheel since 1987.
tried tracking the owner down for a RSOC member, but the dealer has since closed and finding the staff that were in the know has proved difficult. be an excellent find if it ever came out......