I have to agree that any damage that is on a pelt will detract from the price. Blood, holes, and other damage can be much easier removed or repaired from skinned animals than from whole ones.
As I have gotten older and my hands don't hold as good as they used to, I have purchased a skinning machine that has saved me hours of labor and toil, you might want to look into one. I get asked this type question alot and the best thing I can tell you is that the less a furbuyer has to do make a pelt look good to sell the more you will get for it.
- Good luck! - Okeytrapper