Lots of people don't like Car Max, but I had good luck with them twice as I was looking for a specific vehicle with low miles and price wasn't my primary motivation. They do a little more than a car dealer lot to ensure the car is mechanically sound (not much). They also have a few late model Wrangler Unlimited models on their site (transfer fees apply, some they won't ship to your local Car Max).
Costly? Yep. But it's got a 5 day on it, and you won't get that from a dude on Craigslist or out of the local paper. Haggle? Nope, they won't, it's not in their model. They will try to sell you an extended warranty and service plan, that's in their business model for sure.
You may find a deal elsewhere, but don't discount Car Max outright.
Also keep an eye out for 13s on the lots, cast a wide net. A think a 2013 JKU Sport base can be found for a very good deal if you get lucky. Otherwise, be patient. Ordering new takes a few months, so buying a used one should take the same amount of time