Some businesses do, Janne. Particularly those that show the origins, insertions and names of the muscles.
The disposal of the sheer numbers of daily dead in some countries is a serious logistics problem.
So, those countries learned long ago that there was a steady market for skeletons, in whole or in part,
In Western medical schools and Biology departments That should be enough of a clue to origin.
Zoology departments try to build collections, skulls in particular, as a public awareness aspect of the school.
I was teaching ar 54N in BC. We knew lots of hunters and trappers. We had skulls cooking for as long as I can remember.
Small animals with fine bones were particularly difficult to process and even more expensive to buy.
This snake skeleton suggests to me that the carrion beetles got to it and ate
as much as they could before the connective tissues dessicated (too hard to chew!)
Are there any of the scales left on the top of the skull? That pattern is a common first clue to species.