I have a 2010 Renegade, and my ONLY complaint is the rattling in the doors when certain bass frequencies get played by the stereo. There are threads on here that talk about how to fix it, so there is a remedy. But I would suggest you find a bunch of music, and play it liberally before buying. By the way, mine has 15K miles and if I sold it now, it'd be for 22. I'd say 17.5 is a great price.
The rattling on mine comes from the window/lock cluster on the door armbar. Both sides. So I'd check to see if those are sitting in there loose or not. But like I said, there is a remedy on this forum for that. Good luck!
1989 Jeep Grand Wagoneer - 4" BJs Spring Lift/Rancho Shocks/Moog Tie Rod & Drag Link/Borgeson Steering Shaft, Rancho Stabilizer Shock, Gas Tank Skid Plate, All Brake Lines, Edelbrock Performer 1406 Carburetor, Edlebrock Performer 2131 Manifold. Soon: Mallory Series 85 HEI Distributor, Xtreme Series Differential Covers.