In 2006, I purchased a white MacBook from Apple telesales in the UK. At the time, I was a full time university student and I asked about their pricing. I wanted more RAM and bigger HDD. The basic MacBook was £749 and the mid-range was around £820. The guy on the phone asked me what I would say for an offer, whereas I would get the mid-range MB for the price of the basic one. I said, that if that was their student discount, that would be great. Later, when I heard that they give 14%, I felt cheated. The strange thing is that for the discount, you need to prove your student status. I haven't and I still got the 8% discount. What's more is that I spent almost a year in Oxford and somebody told me that you get 15% off there.
I think the AppleCare is essential if you are buying as a student. For a MacBook and a MacBook Pro, it's around £55-60 for students instead of £180-200. I wouldn't recommend buying them at full price, but at that price, they are a must.
I purchased two MacBook Airs in the past, both were 1st generation refurbished ones. I couldn't get discount on them nor on the AppleCare. However, with the Airs, the hinges are problematic and as I am aware, they are being replaced for free by Apple even outside of any warranty period as they are considered to be faulty due to a design fault.