wrong fuel damage
I don't know how similar the VP44 mechanicals are to the 1st generation pump, but my 1989 Dodge was fueled with approximately 50% gasolene and then driven over 250 miles. Later in life ir got filled with about 75% gas and driven around 15 miles. I've since sold the truck, but it is still running on the original pump and has over 225,000 miles now. It runs fine.
Bottom line is, I would cry a little ( okay, a lot! ) to get the best deal I could and buy this truck. Remember, the VP44 is covered on the engine warranty.