I've taken Randy's Handgun 101 course. He is a professional and well respected trainer. Probably one of the very best in the US at diagnosing technique problems. His schedule is on his website.
http://www.cumberlandtactics.com/
He also has a rifle course I would like to take.
EDIT: His courses are right in your price range as well. Prices are at the bottom of the schedule of classes.