H.G.
I'm a piano teacher and I charge $20 for 30 minute lessons. My greatest demand time is 5-7pm which I do two days a week. Lots of parents can't get their kids to you until then, it seems. When I started teaching I researched the midcities area and found everything from $12-35 for a half hour lesson. Have you heard of www.GetLessonsNow.com? I've gotten most of my students from there. I have all I need now and keep getting requests. It's a $50 annual subscription and I think it's worth it.