Deere parts go through the same process. Still doesn't explain why NH can charge $75 for a seal that Deere would sell for $20. I see this over, and over, and over again on multiple types of like-for-like parts.
As an example, both Deere and NH (Ford) used to use ZF front drive axles. I used to buy parts for drive axles for a Ford tractor, FROM Deere, over the counter, for less than dealer cost at a NH dealership. Didn't matter whether it was tie rod ends or u-joints, the result was always the same.