Just been looking around online and saw them selling them for this great low price. Seen people vote XBL points hot for £14 so figured this was a good deal and seen others have put up this retailer with no issue before (when checking if it was already posted).
For extra security for anyone who doesn't know the site then you can use Paypal so thats perfect if you don't even want to use your card details.
/ EDIT / I received an email from the guys in regards to the 5% discount by signing up to the news letter. It does NOT work, so don't waste time. Basically they have applied 30% discount to there prices so will not do the extra 5% because it is 'negated' as they suggested but hopefully the price will be good enough for you to be interested anyway.
That's that then, buy it if you want cheap points!