Additional pertinent info:

Before I realized that I could find a w140 for under $10,000, I looked at a few "nice" 560sels.

One that I saw was white, light colored interior, drove and looked near perfect. 110k miles. $4000.

There is also a very nice 560SEC here in town, lots of upgrades, 70k miles, black/black, one owner who has all records. $15,000 (firm)

Mileage and price are not everything. Condition is everything. There is a guy here in town who has a 535i with 350,000 miles, and I would gladly pay him up to $3000 for the car (even though it "books" at under $1000), as it is just that well maintained.

-David