I see the Book Depository are listing the Rebel Transport at £29 on their own site, with free delivery and an estimated dispatch time of 48 hours.
I'm sceptical they'd be able to discount a new and in-demand product so heavily, and dispatch when the rest of the UK market is still apparently waiting to receive stock. I also see a lot of negative reviews and criticism for them out there.
I've pre-ordered elsewhere myself so it's a moot point, but I'll be interested to see if people are recieving their orders for this company for future reference...