If you want the best price they get the educational discount by using this link How to get a 15% discount at the Apple online store from your own home (you’ve got to be a student though). - Mike Wilson I did and got 15% off and 3 years warranty as I bought it for some one in Uni. But I use it more often
I paid £780 delivered for my 2014 13" Mac Air 256Gb on Amazon if that helps. Apple shop price on it is still £999.
Here you go, this is the one I bought in August for £770 delivered. Apple MacBook Air 13-inch Laptop (Core i5 1.4GHz, 4GB RAM, 256GB HDD, Mac OS X 10.4 Tiger): Amazon.co.uk: Computers & Accessories It's the current one, but has gone up in price to £869 new or £650 used. You can buy 2nd hand, but they hold their value well and like anything you take a chance, hence why I paid a little more for a new one.