Digidesign has a small markup from what GC/MF buy the products from. MonsterCable on the other hand is sold to GC/MF at less than half what it is sold for - so yes it's possible to get the prices dropped on those.
But, just in terms of student discounts - no. Day in and day out, I have people requesting discounts just because they are either a student, are in the military, or are from a church. I don't care what your reason is, a musician is a musican - and no one is going to discount you over everyone else just because you are in school/in the military/ or think you are part of gods plan.
I have seriously had customers yell at me and tell me that if I don't give them a discount, then I'm going against god and his will. I will never treat one customer better than other regardless of their affiliation.
HOWEVER - if I know a customer is a pro musician, obviously scrapped for cash and just trying to keep his source of income alive - then you sir are worthy of any discount I can offer.