All the signs seem to suggest that this is a US release and the few sellers that I've found have almost all been on that side of the pond.
The current eBay prices are around £50-£60 from UK sellers or £35 plus about £15 shipping (plus potential Customs & Royal Mail charges, if imported to the UK) from US sellers.
US fans may find it a better deal; around $35 and much cheaper domestic shipping ($5 or so).
I might weaken if I saw one for nearer to £30, but it makes you wonder why it wasn't held back a few weeks for Record Store Day, as I've read that it was a limited pressing of 2,000.