I purchased my 5G 60GB iPod from the Scottsdale, AZ Apple Store, it was a hundred dollars off because a customer had opened it and returned it, it was sold with the standard Apple Warranty (I bought AppleCare.) But the %10 still applies for the recycle your iPod, no EDU discount available if I recall, the only downside was that the iPod had some cosmetic wear and I could careless if it was a refurb with an iPod, since if anything goes wrong Apple replaces the unit.
I'm fairly sure that the refurbs are in store mainly for replacements, so I'm not sure they sell them, but maybe a store employee can correctme.