Welcome, Enjoy to the forum, I would suggest you take someone with you who knows Jags as they can be expensive to repair, normally better to pay for a dearer model, usual things to look for are the condition of the car, will let you know if the car has been looked after, defo for a full service history, preferably main dealer, check tyres for wear as they are dear to replace, take it for a long test drive, check auto box with kick down etc, play in manual box etc.