Sorry, but this is all rubbish. I mean, charge what you want and feel comfortable with. It doesn't matter AT ALL what other magicians are charging. Do what YOU do. Yes, other magicians in our areas are our friends and yes you could ask them for advice. But, we all make different salaries doing the same job in the corporate field. You don't have to charge what others are charging for this.
Several times, just because I wanted the opportunity to perform I've cut my price to match what someone can afford or wants to pay. I personally have never cared what I make from a gig and therefore don't really have a set price. Contrary to what some may say on this forum or anywhere, this does NOT make me a bad person.
I've often considered taking the approach of, and I have said this in the past, pay what you can based upon what you thought of the quality of my performance after it's done. In other words, pay what you think I'm worth. This is humbling and gratifying, and I've found, works VERY well. Say you normally would think to charge 60 dollars, or 150 dollars or whatever you want for the half hour, your people will give you 100s of dollars and you DON'T have to feel bad about that. They gave you what they wanted.
Again, and the bottom line is, charge what you want and feel good about it.
If i want to feel good about something i will help my grandmom with her groceries, if im selling a professional act, im going to do it from a business standpoint.
Charging 60 dollars for a kids show is not going to help anyone. The magician getting the 60 is going to get drastically underpaid, and will not be able to live off of his magic. So when the 16 year old grows up, and actually has to provide for himself, he is screwed. The 60 dollar act also undercuts actual professionals. It steals from their pockets and people will be less likely to pay a legitimate price.
Charge little more than nothing if you want, and feel good about it, but in the end who are you really helping.