dont get your hopes up about finding a VX with a factory warranty (unless your buying from someone in your family) the longest ive heard of a warranty lasting for the second owner is late this year (i have an 01 with 45k miles and mine only lasts til oct)
if you are worried about the car dying on you, you can always get an aftermarket warranty, many will cover anything that happens to your VX and since VXs are relatively new, and you can find them with low milage, it shouldnt cost you too much to get a warranty on it