Prices for shoulder mount deer run in the $350 to $600 range. Most important thing is to find someone who does good work within a time frame that you are comfortable with. Don't just go with the cheapest. Also just because someone is expensive doesn't mean that they are good either.
Traditions only last if you pass them down to your kids!
Go look at someone's work and decide if the work is worth the price. There are some real artists out there and you have to pay the price to get that kind of work. On the other hand there are some guys who charge the same rate and don't do such a good job just because that's what the competition charges. And since the Dept of Ag took over regulation, there is no test any more and all a prospective taxidermist needs to do is get a sales tax license and hang up a sign. So it is up to the buyer to make sure he does his due diligence before laying his money down. You only get one chance to get it right.
Youth and enthusiasm will always be overcome by age and treachery.
I'll echo what cspot and gdaddy said, take some time and go to a few studios / shops, ultimately, you are the one who has to be happy with your decision. I went 20 minutes away for my last whitetail shoulder mount and paid $550, I drove over an hour for a mallard and paid $250, turn around time was about a year for both, and yes, I will use both again
Time spent outdoors is not subtracted from one's life.