As nice as the car seems to be, I think the price is pretty steep! Not so much for a dealership, but consider if you purchased it and turned around and tried to trade it in elsewhere (such as Park Place). A lot of dealerships don't even bother dealing with cars having over 30K miles. They just offer a wholesale price (which is substantially less than the 18K selling price.
Double check the blue book value for that car too, but realize that dealers almost never offer the blue book price.
I'll bet Ewing ******** bought the car for around $8500 (from a wholsesale bid).
Wish you could have found it for sale by the owner,who would have gotten more for the car and you could probably get it for a lower price...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car