Thanks for the replies- a lot of helpful hints. I went to KBB (Kelly Blue Book), which is the site I usually check car prices and it shows that the private party value for a 89 560SEL in good condition w/140K is $5025. I have seen some sell for this price before on E-Bay. So I guess that $6995. is not an astronomical price for a 86 560SEL in excellent condition. It just seems as if the older early 80s 300SD's with low miles are priced not much lower than a late 80s 420-560SEL's in equal condition. I will continue searching I guess for a good car at a good price. Thanks again.
1993 Mercedes 400SEL 4dr
2012 Honda Civic LX 4dr
1972 Chevrolet Caprice Kingswood Estate 9-passenger wagon
1973 Pontiac Grand Ville 4-dr hardtop sedan
1988 Mercedes 300SEL (was mine, now mothers)