tell them you want 4 new (matching)tires, new rotors, new pads, and check the front CV axle boots for leaks, if they leak grease that can cause your rotors to wear unevenly. and then give them the 11,800. check
http://www.wjjeeps.com/tsb.htm and see this jeep has any of the other common issues. Does it have all service records? tell them they can't get full retail price if it's not in perfect condition(except a little normal wear). and who gets book value for a used car anyways...