to the Forum..
At $15,000 you should be able to find a nice low mileage 2003, or 2004 TJ, with a automatic, 4.0 engine and Dana 44 rear differential.
Stay away from the 2005 and 2006s, because they have a OPDA, oil pump drive gear, serious issue.
The 2003, is pretty much known to be bullet proof, with the 4.0 engine.
I would look on craigslist, the auto trader, and car gurus.