It is not, at the time of writing, available in the UK; I ordered mine from amazom.com and it arrived within two weeks.
My personal view is Cozmo is worth the price (I paid $179.99 + shipping, etc), the Anki team behind have made this a small robot that packs in a lot of user experience. You want to play with it, and hear it say your name or watch it win or lose in a game with you. I am looking forward to trying to program it - but maybe first I will just go and have another game of tapping the blocks, or through AR watch it picking up the blocks from its perspective, or...
Installation guide - http://cozmosdk.anki.com/docs/initial.html
All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon