At £10 difference at buying point Pure I'd buy then. If pricing was as at launch, then I'd go Pulse. As you got Pure for £635 elsewhere you got better deal then on OCUK on launch day, as
Pure was £690.
I had OCUK fail on me launch day and following day also. Another site I couldn't even get on, it stated no connection. Few other places were also busy and retries occurring to get a product in basket to checkout.
If you need the card then go for it. If can wait I'd say why not. At the moment I can't get the launch prices out of mind to commit to a buy, besides other factors for me.
There is a BOM for the card. AIB/distributors, need to make money. Besides physical costs of card, they'll be other elements priced in, warranty, etc. So I wouldn't put that price tag on card.
But do think people need to place perspective what tier of card these are. This was one reason that made me hold now for right card at my right price.
Some are looking at nVidia pricing/availability, then buying 9000 series. So a lot of variables on what we each may think is right price point to make purchase.