We have a 2001 Winnebago Adventurer 32V and love it. Make sure the Ford chassis is also a 2000. The model year of the motorhome is determined by the model year year of the house. Many times early production coaches are made of previous model year chassis. 2000 was the first year of of the 310 hp V10. They had different heads than the previous model year and didn't suffer from the sparkplug problem.
We have over 85,000 miles on our motorhome and it still runs strong. We've had a few things go wrong over the years but nothing out of the ordinary. As for the tires here's a link to a page on the Goodyear website:
http://www.goodyeartires.com/assets/...d-warranty.pdf
There'a a section entitled "
HOW TO READ A TIRE D.O.T. SERIAL NUMBER"
The part of interest is the last set of digits in the serial number. If there's only 3 in the series they were made before 2000. If there's 4 in the series they're made in 2000 or later. For the newer tires the first 2 digits represent the week of manufacturer and the last 2 represent the year. Using the example "3510" (as the last 4 digits) the tires were made in week 35 of the year 2010.
If the tires were made in 2004 or earlier they're probably due for replacement regardless of the miles. More often RV tires age out long before they wear out. A new set in our area will run around $2,200.00 - $2,400.00 mounted and balanced with new valve stems, taxes and disposal fees. Take that into consideration when you make the offer.