Nah, that's a bit too much unless they justify it somehow. Justification might take the form of, it is a rich neighborhood, cost of living is high there, and/or the person has a great reputation for teaching in the area or they are the only one around with an exotic airplane you plan to buy, or they operate out of a club that has lots of perks associated with it such as sims, grounds schools, and/or a new fleet. Normal rates vary per region but $25-$50 an hour is the normal range I would expect to pay and there is no difference between FAA certificates. People really get raked over by these schools that have all new aircraft, some of the rental rates are insane and I guess they tack on high instructor rates to make you think they have something better when they really do not. Shop around. I would not pay over $100 an hour wet for a trainer even now and for a full time instructor, $35-$45 an hour.