I agree with Bear, It seems a little high for one with a stuck engine. The tires are used radials so may have been put on used, in which case would ease some of the engine fears, but even so, if you had to put in a complete rebuild you could easily look at $1000 US.
The reason that the IH models tend to run a little less is that there are a LOT more of each IH model made. IH made more H tractors than MH made tractors! The early JDs tended to be small runs too.