Root Moose
Expedition Leader
No worries, ask away.
As for common oil leaks, the oil pan and/or rear main seal are common on higer mileage one. Another even more common one is the oil filter adapter housing. If you can get the tork bolt out, it's a cake to do with 3 new o-rings (dealer and aftermarket have the 3 o-ring kit). I built my own tool to make this easy to do and just did it on my 2000 back in Dec. Greatly cut down on the main leak.
Mike nailed the most likely leak points. In addition the rear of the valve cover can have a tendency to leak and work it's way down to the back of the engine as well. These are robust engines. A little leak is not a big deal. All the normal caveats apply - sight unseen and all that.
If the Jeep hits all the other criteria that you are looking for then I wouldn't let this leak stop you from buying it. Worst case it is the rear main seal and you'll spend a messy, time consuming afternoon replacing it.