A point I've made in the past-you really need to come up with a realistic idea of how many miles you plan to put on a bus. 5k a year? 1 long trip a year? 3 hour trip to the inlaws to camp for a week? 5k a year EVERY year for 20 years is 100k miles-before its a 140k bus--still not even broken in. You'll end up spending the same amount on time sensitive items-like tires. (with only 40 k on it, i bet they are original--them are some old tires.
) Remember-low or hi miles-the bus is going to be parked far more than time on the road.
Low miles is nice-but i don't think its worth paying more than twice as much as a maintianed bus with 140k or 240k on it. None of us operate a bus the way it was designed or was used in its prior life. Buses like getting owned by us.