I will second what wayne said about the rust underneath.
My dad got a 2.0 petrol x-type as a trade-in a while back which he felt he had to take because he knew this old unwell guy for so long.
One owner car, 57,000 miles and underneath was the worst I had even seen. As the picture wayne showed, these sills didn't have just the odd hole, there were sections that had largely disintegrated.
A quote from the jaguar garage effectively wrote the car off by the bill they were asking but an indy mechanic made a very fine job.
Thats not to mention the numerous electrical faults including the automatic gearbox being stuck in limp mode.