Another thing that you may want to research is the vehicle's "in-service date."

This is available from any Isuzu dealer -just give them the VIN. This is the day that the vehicle first went to private hands (from Isuzu).
If the date is earlier than 6 January 01, then you are beyond your warranty already, regardless of mileage.
There were many VXs sold late in the year, (cost, looks, whatever, kept them on dealer lots) and as a result it is still possible to buy a 2001 that is still under the 5 year mark. E.g., my wife's Dragon does not hit its 60 months until 9 September 06.

Joe is selling an outstanding example, maybe he could adopt you and transfer the 100k warranty?