You aren't going to get much of a deal on one right now as they haven't been out long and the "new" hasn't worn off them. Two places I would look would first be this thread where people who own them are talking about them:
How Much Did You Pay for Your Wrangler Unlimited
And this Jeep online dealer website has a very good reputation for both low prices and being honest:
http://www.jeepwarehouse.com/