A colleague of mine owns a 98 XK8 and I was absolutely floored when he told me he had to weld his floor pan at the front end of the passenger side floor as it failed MOT!!!!
The corrosion point was in exactly the same place as XJS's at the front end of the floor pans (yep I know they share floor pans) which I found unbelievable as this area must have been known to Jaguar not 20 years earlier.
I am lucky enough to own a Japanese sports car and when I recently changed for a newer more powerful version I was considering an XK8 of the same price (£11-£13K) but stuck with the Toyota because of the reliability and clean metalwork. Now seeing the corrosion on my mates car I am so glad I did.
All Older XK8 owners check your floor pans and other areas that are shared with the XJS as there is likely to be rust lurking somewhere if the car has not had the best service history