Beat the UK shortages - the price above includes express delivery. The ordering process is identical to Amazon UK,and you log in with the same username and password. I bought a Wii from Amazon Germany before Christmas and apart from the Euro-plug it was identical to a UK model. Obviously since the Wii Fit doesn't need a mains plug there should be no difference at all between this and the ones (not) available in the UK.
I ordered one today and the price above is a rough conversion (80%) of the price I paid in Euros. Celebrate the entente cordiale and stuff the gougers on eBay.