I was going to buy it a few weeks ago from Amazon marketplace for £12, but changed my mind a bought something else instead. Then, a week ago I checked again and the price had jumped to £45!
Luckily, I managed to find one on eBay for the (slightly) cheaper price of £30. Wish I'd got it when it was cheaper. It's a limited edition numbered release, so they're only going to get rarer and more expensive unfortunately...