I suspect that there is a bit more to the particular car you are describing than that it is really a two owner 1993 BMW 525i in Lazer blue with light silver grey leather, 89,000 miles on the clock with a full service history, superb panels with factory paint and mechanically perfect.
How come you happened to stumble across it and glean all this information but apparently not the motivation of the seller in deciding to dispose of this wonderful car?
Is it perhaps that despite being "mechanically perfect", it cost a fortune to maintain?
Maybe the owner couldn't find anyone prepared to buy it and the person in the dealership failed to spot an opportunity to make a few hundred by doing a private deal?
A few people seem to think that there is some evil conspiracy (scam) afoot here; there isn't, it is just market forces at work; most people really aren't that keen to own any 16 year old car, not even a BMW 525i with hundreds of thousands of miles of trouble-free life in it, no matter how "mint" it appears.
Your kidding?
That e34 would have sold easily had the owner taken the time & effort to advertise it, I'd happily have an e34 myself except it appears the decent ones are getting scrapped!

Edit: Fox makes the point a lot better than I.

