e60 530D valuation - LOW MILEAGE

[Hanys]

Hi guys! Sorry if I shouldn’t put this kind of post here but I need to ask people that actually know something about these cars.

I have e60 530D Auto SE with 4170 miles on the clock. The car has been in the garage for almost 20 years. Interior without single scratch and EXCELLENT exterior!! Could you please tell me roughly how much could I ask for it? The car just passed an MOT without any problem as always, no sign of rust underneath it’s a basically new car!