To get to the ADC Store Page to see what the discount would be...
1. At the main (Apple) page in the upper right hand corner enter "ADC" in the search bar.
2. Let the suggestions popup before you hit enter and select the only option which is the ADC main page
3. At the top right there should be an Information link (click it)
4. Select ADC Hardware Discount Program
5. Select United States
6. Click the Blue Link ADC Hardware Purchase Program Store
I would have just given you the link but sometimes it doesn't work and this method above is sure to work every time.
You don't have to be a member to see the discounts. If you are a member however, remember that you must be signed in to get the discount.
Apple Developer Connection. Anyone can purchase a regular membership for $500 annually. Student developers can get a membership for $100, and have access to a 1 time lifetime discount on a computer. You're supposed to be a developer to get this discount, but many other people have been successful.