I'd see if you can find someone in the local area who IS a VX owner, or has owned one in the past--who can kick the tires for you. All VX's have the window issue. SBC still sells brackets for fixing this--so buy those & do the repair work yourself; problem solved. It they found a replacement (i.e. used) engine, lord only knows what condition it's in. It might even be a 3.2L instead of the 3.5L. A rebuilt engine isn't a bad thing at all. I'm almost positive mine had the engine rebuilt before I got it. It also doesn't burn a lick of oil--which is HIGHLY uncommon for the VX. I'd wager that they used updated internals to fix the burn issue.

This website has a lot of good info on what to look for (problem wise) on a VX. Some of the high points are rust (look at the condition of the crash bars as an indicator). ABS module inop. TOD not working properly (sometimes it's as simple as a fluid flush). Backlash adjustment (worm gears...of which I know very little about). U-Joints & bearings for the driveshaft (happens with all vehicles with age). Wet carpet (multiple causes--sometimes age related). Inside door handles splitting (poor design). Worn leather (all vehicles).

Let me know if I can help in any way. I highly recommend tint--especially on the hatch & rear windows. 20% will greatly reduce sun damage.