I'd need the key then a usb to download the drivers it's cheap now I should buy it
Well, if its under the normal prices that you normally see by a lot, make sure that the reseller on amazon is legitamate, but if it is legitamate and it is a great price(i cannot open the link), id buy it and just set up the download on a usb, then download it on the computer, then when you get the key, just input it and you will get all of the features of windows unlocked
It's Windows 8 and £40 and says it's sold by Microsoft
If it seems legit, I'd get it
No no no. The Title of the listing says "by Microsoft." It's not sold by Microsoft; it's made by Microsoft. It's sold by whomever is offering it. A+++ Service at the moment. That seller is offering the key via email, which is not a good idea for you. The other sellers offer OEM DVDs which might be legitimate and might work with your hardware. Maybe.
It's difficult to verify the reputation on Amazon. For all you know, they're burning DVDs and attaching their printed COA. The product key can be obtained from their MSDN license. Buyers will most likely be able to activate the key and will leave positive feedback. However, all the keys under the seller's MSDN license would be deactivated if Microsoft finds out what the seller is doing.
I see it's fulfilled by Amazon.
From their "Fulfilled by Amazon" Web page: Amazon also handles customer service and product returns for Fulfilled by Amazon items.
So........if it's not a legitimate key, I'm sure Amazon will give you a refund/money back.