be careful of XKR in the £8k bracket , they certainly will be pre 02 models, the earlier Xk engines have had serous problems with the Nikasil bore linings dropping to pieces with disastrous results (ie expensive )
I'm a big Jag fan , having owned quite a few (in fact I have a S-type in my garage now ) but I certainly wouldnt entertain an early XK model at any price