I ran across a tractor that is not running but engine free...he said previous owner heard it knocking and shut it off..hasn't run since and this guy has never heard it run...doesn't know condition of transmission.. pwr steering...pwr director.. or anything....has good sheet metal ..good rubber... 3pt hitch...so my question is are the budas pricey to rebuild...are parts readily available..any inherent problems with these engines...and what would this machine be worth as it sits...lots of unknowns and I would want it to use not collect..although they aren't as high as the wd45 diesels they do seem to be getting more of a following...thanks for any input