If you are planning on attending any of the fur auctions at Fur Rondy, with the intention of buying a mountable skin - please, please, please seek the advice of your taxidermist before going (if you don't already know what to look for)
There are many hides and skins sold at the auction that are not mountable for taxidermy purposes. I think the auctioneer tries to tell folks if something is 'taxidermy quality' - but that doesn't necessarily mean it will make a good mount. Lots of mistakes can be fixed - some cannot. Hides that have already been tanned should be 'questioned' - regarding how long ago they were tanned and who tanned them. If you buy a tanned hide at the auction, make sure you can find this out. Recently worked on a phenomenal wolverine that had been bought at the auction as a tanned pelt. It completely fell apart when rehydrated for mounting. The quality of the animal was exquisite - but it is now relegated to being a wall hanger.
Generally - hides for mounting should not have any cuts in the corner of the eyes, should have plenty of inner lip, plenty of inner nose cartilage, and long inner 'ear butts' with cartilage intact - cut off where the ear canal attaches to the skull.
Feet should be skinned so that they are open inside like a glove, or a mitten.
It is better to go to an event like this prepared with enough knowledge to know what you need for taxidermy purposes.
If you are looking for a bear for a rug - make sure to inspect the hide for rubs, (guard hair rubs or rubs to the skin), claws, damage to the feet and face. Last year when I went to the bear hide auction, I looked carefully at all of the hides... There were 3-4 brown/grizzlies with decent hair that were mountable. None of the sheep was mountable. some of the black bears were mountable.