wow, that place is literally stuck in time!
I don't think that place is worth more than the land value and the building shell value. The value in it is really for someone who wants to turn it back into another car dealership. There's probably extensive work that needs to go into the building to get it back into code. It's a pure car dealership business play here, I don't think the 1980's BMWs on the lot needs to be factored so much...
Plus, how much is a 198X 6 series really worth, it's all peanuts compared to the asking value for the land and building itself.