Apple Amazon pricing?

[ajf]

Looking at some of the Macbook Air and Pro (non retina) models for a colleague and noticed they are a lot cheaper?
I assume they are all grey import models, but all are fulfilled by Amazon and delivered next day.
Any reason to NOT buy?
I believe warranty is worldwide?
Only question I guess is do they have a UK keyboard?

 

[ajf]

Thanks.
Just looks like the keyboard layout that might be an issue then, although on Apple, isn't that just the pound sign lacking?