This car is for sale for by dealer @ $3,900 + 106K mi. Should I be worried?

What is your question?

This car is the one I dream of, though a 2000 is a bit old. Still, it is for sale for $3,900, I'm assuming because of the mileage. What could I expect in terms of mileage remaining, assuming the carfax is clean? It's so cheap, even if it lasted 3 years it would be worth it to me. I've never bought a Jag so not sure what to ask/look for or beware of. Thoughts?