18 quid for 20, nuff said
If you are someone who has been snowed in, or if you can put up with the wait, then this is for you.
A word of caution though, if the item you want to buy on the playstation store is in some sort of special offer, then check the date the offer expires, The delivery should be here before it ends anyway, but you need to check to see if it is not on its last day of offering.
other than that, these cards are genuine and at a very good price. You will not find these any cheaper in the shops because the card is worth 20 pounds, and shops like to exploit that to raise the price from its value so they can make more money out of you.
Baisicly this is a fantastic choice, a good 2 pound profit on your part, just make sure what you want does not expire within 3 days, or you could lose the offer.
apart from that, I would heavily advise, just make sure everything is in HIGHER CASE LETTERS and the numbers are as displayed
NOTE: if you want to buy this as a gift, this is not for XBOX, and will not work on its store