Are you talking about do-it-yourself, or sending animals to a taxidermist? I have several ducks, geese and one deer mounted. It can be expensive, but I have used a guy for many years that is much lower than the market rates. He is a couple of hours away in a small town, but I pass through there occasionally, and he comes to my town occasionally so it works out. I would say shop around. In a city, the price will be very high. If you can get to a smaller market, you may get a better deal.