NADA shows these prices: list $32,829, low retail $15,160, and average retail $18,270. The unit probably is about due for new tires, check the date code on the tires. 5-7 years is about the life of a trailer tire. The tires on the unit probably were made in 2007. Tires can look very good and still need replacing. Also check for any signs of water. Water leaks can be expensive to repair. Also check the roof carefully, especially the caulking. Does the price include a good hitch with sway control and a brake controller if you don't already have one? Have fun.
2014 Eagle Premier 361REQS
2013 Ford F350 Crew w/ 6.7 diesel