After struggling with this topic for about 8 years, I've personally decided on the Dozier
Professional Skinner. I know it blows the $100 limit, but I had to say it. If I really was stuck to $100, I'm afraid my pick would be the Browning tool that has the drop point blade, bone saw, and guthook blade. Retails for about $70.00, and would do anything to a whitetail that you desire.