I pay 110$ for every 6 weeks of class. Or if I cant make the all the classes due to schedule conflicts I end up paying 20$ for each class I take.
It really depends on where you live. I know that in Arizona there are alot of agility clubs...so rates are ALOT cheaper as there is competition. I went to a trial while I was there a few years back and there were classes going for 50$ for 6 weeks.
However here in Maryland there is no competition, the place I train is the only place for hours...so they can really charge whatever they want and get away with it.
Good Luck starting agility, it is a blast, and HIGHLY addicting!