i live in okc, okalhoma price of living is low, not the ideal place for a magician. people dont really hire people for kids parties here, unluss the kids are spoiled, soo not looking so good for me at the moment, 100-200 seems like a lot to me i dont know anyone that would offer any magician that here in okc, except for like big occasions like jewish batmitzahs or things of that sort.
Join your local IBM ring there in OK City. I know for a fact that some magicians there are getting $150 minimums for a party and are booked year round. As for evolve629 who can't charge more than $50 for a half hour show, get better at magic before performing. I would be offended if someone thought I was only worth $50 for a half hour show. My minimum is $125 and the price goes up from there. Yes there are some in town that charge $50 a show, and every time I have someone say "johnnie only charges $50 and you're $150" I will tell them "you can not get a new Rolls Royce for the same price as a used Yugo. I have a deal with the other magicians, they don't raise their prices to match mine and I don't lower my quality to match theirs."
Remember if you price yourself low people will expect the quality to be low.