Thanks Sue, I was actually hunting around for that while you where posting it up.
BigG, the list that Sue put together is for sellers, but it will help you figure out what to look for. The window's binding (not rolling up straight) is a pretty common issue, and if the VX still has it's original CD player it tends to eat CD's so there may be one or two stuck in there. Some of our engines burn oil so check the dip stick and ask if the oil level has been looked after.
I'm sure others will chime in with more.
Good luck on your search. If you find one that isn't near you feel free to ask if someone here can go look at it for you (that's how I found mine).
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless