yes, its a $100 dollars for a student membership. Otherwise, its a lot, lot more. I assume the only reason you are getting it is to get a the discount. But be aware, that unless you are buying a high end product (mbp, mp), you are wasting your money. With cheaper products you will actually end up losing money when you add in the cost of membership.
also, the discount is a one-time discount. There is an apple online store dedicated to adc members which has all the pricing. I have the link bookmarked but i am not going to post it. If you are resourceful enough to find out about adc, then I am sure you can find the adc page 😉