And of course, size of the motor/tractor matters too
bigger tractors/motors can go many more hours.
and your skill in repairs matter. If you're a good mechanic and don't mind, hours may not matter.
For me, IMO
compact tractors are DONE by 4000 hours, so I won't even look at anything over 2k hours and personally there are lots of deals at the below 1000 hours level.
Same thing with skid steers. DONE by 4k hours, you see tons of
SS's for sale at 2000 hours, ever wonder why?
Bigger tractors go longer. I see lots of 75-125hp tractors still in good shape at 6000/7000 hours. So, probably look at them up to 2000/3000 hours.