The windows need silicone sprayed into the tracks about once every 3 months or so depending on how much you use them. Carfax can only report known accidents that were reported for insurance settlement. The VX could have very well been in an accident and the owner repaired it at his own expense or worked a deal with the other driver.

If the vehicle overall looks good, I'd use the flaws you found as reasons to get the asking price lowered. Test drive it to make sure the cooling system was not compromised. Also the airbags may have been replaced. let a mechanic you know and trust check it from bumper to bumper before you invest. 2 cents