I think the 1998 XK8 has a great look to it, why are they so.....affordable????
Are there some major issues?
I am considering buying one someday.

I really like the 2002 X-Type that I currently drive daily.

 

I can't speak to values in your part of the world (I wish they were more affordable in my part of it ).

There is a very good XK8/XKR section here anyway with lots of good folks and information on these models. See: XK8 / XKR - Jaguar Forums - Jaguar Enthusiasts Forum

The FAQ is useful reading if you are considering one - see the third "Sticky" down from the top.

Regards
Cadmium