Hi lazylab, Your question is a hard one to answer. I don't know what you mean by price depending on style. Do you mean the style of duck or the style of pose?
May I suggest you try this. When you collect your trophy bird you want mounted, call a Taxidermist and talk to him/her. Ask about various poses, because depending on the species of the bird, one pose may not work for the species like it will for other species. A good example would be if a client called and wanted a Diver duck mounted in a standing pose, I would suggest a pose consistent with sitting in a relaxed pose or with one leg out or something similar because of the anatomy of Divers. They just don't look good standing or being out of water for that matter. A good bird Taxidermist will know these things.
Where I am going with this is you need to feel good about talking with your Taxidermist. He /She needs to take the time with you to discuss everything about your trophy because a good taxidermist knows how important that trophy is to you.
I strongly disagree with singleshot12 statement about average Taxidermist's and Pro's. If you talk with your Taxidermist and they make you feel good about your trophy and your happy with the results, then "A PRO" did a great job for you and your mount, no matter if your trophy cost you $150.00 or $450.00.
I hope this helps with your decision making and good luck.
John