how much do you reckon a customised classified script with directory of dance studios should cost... ?
I think you need to think about the features, but I assume you are wanting a directory script that would allow you to show some fields for each dance studio (ex, title, url, description, address, map, image) plus you want the studios to be able to list products for sale in a classified section. phpLD classified script would do this out of the box and starts at $30.