Yesterday sounded like pandemonium in London; one of the bigger Soho stores, Sister Ray's, sold its 25 copies within the first hour, I believe. Most of the other stores got very few copies and sold them equally quickly. Stores were not allowed to reserve copies, so I missed out at one store by not being able to get there quickly enough, even though they had two left when I phoned...
I was too slow off the blocks, but managed to pick one up at lunchtime; had to grit my teeth and pay £9.99, though!

Could have sworn I saw something on the net suggesting that it would retail at £5, but the shop where I bought mine claimed that it cost them more than that and that there was no "recommended retail price".
Would be interested to learn what others paid...
Sadly, I've yet to track down a second copy for another VRM member and I guess it's less likely that I'll find a small indie store with one left over, but I'll keep trying.
There are heaps on eBay with start prices ranging from 99p to over £25, but not too many have attracted bids yet. It might still be possible to find one for £10 or less via that route; might be worth keeping tabs on any which don't sell and then checking whether the sellers are open to offers?
If anyone's not a registered eBayer and still desperate for a copy, I'm happy to bid on his/her behalf; just tell me what your maximum bid, including postage, would be (you'd only pay me the actual cost).