It depends on where you are at. There are non-profit clubs which are very affordable. However in much of the USA now, any idiot who has ever worn a sleeve thinks they can charge per bite so it can be expensive. This is also an extremely slippery slope, as if they are being paid they often think they have to make your dog look good. This is not necessarily beneficial for the dog's development. I train at a non-profit club. The training director is a world class handler and training helper. The total I pay is $350 a year for training 3 days per week and multiple bites every session and nobody makes a dime. Even the training director pays the same amount as every regular member. Many people pay this amount for a month and in almost every case the training is not even close to the quality I get at my club.
Like rosamburg said it can vary.
When I visited a club back in wis. And the one I semi use here the Wisconsin one had a yearly club fee of about $150 the Minnesota one nothing and then each was a "tip your helper" mentality aka there was no required training fee but everyone usually gave the helper some money as a thank you for coming out to work the dogs.