Student discounts used to be much better 10-15 years ago. These days, the only really good deals are on older hardware—sometimes previous-generation. I've seen these units sold at campus bookstores of large universities (Stanford, UCLA) but never on the web.

The last time I bought a Mac with an education discount, the computer was about 7% cheaper, but the AppleCare was 30% off. Not a bad discount overall, but not enough in the hardware department to break even on a resale, even new in box.