Also look for what has been changed on the Jeep, such as body lift, suspension lift and steering upgrades etc. If something aftermarket looks like it was installed sketchy, the rest of the Jeep probably is too. Also, get the various receipts for work done on the Jeep by previous owner, that could play a major part in what you pay.
Good luck, and have fun. If you plan on wheeling your new Jeep, the best investment you can get is a winch, and another vehicle to drive while you repair your jeep. Because you will be repairing your Jeep, no matter how good it is when you buy it.
DH