Actually, it's not. Apple does sell Macbooks through Amazon. No iPhones or iPads but Amazon has been selling Macs forever - http://www.amazon.com/b?ie=UTF8&node=2423178011
[1] http://www.amazon.co.uk/Apple-iPod-nano-16GB-Generation/dp/B...
[2] http://store.apple.com/uk/browse/home/shop_ipod/family/ipod_...
(That Amazon link doesn't include shipping but that's only an extra £3.99, so still considerably cheaper, and I'm sure when I bought mine it had free shipping... could be wrong, though.)