All Yanmars were born good, but a lot can happen in 30+- years. YM1500 parts are more available than most. Average price probably $2500+-, depnnding on location and condition.
It may not have a water pump but could be added. A 2000 is a better more common tractor with a water pump. The frames get heavyer above 2000. Hoy tractor is grate for parts. Also little miami in ohio.I Paid 3800 for my 2000 about 8 years ago.prices seem to be droping in the last year.