In the UK there are only 2 stores that have the PSPgo white in stock and they are Game and Amazon.
Game have it for £129.99
Amazon have it £158.99
The Black can be purchase from the the Hut group, Amazon, HMV. The cheapest is the Hut Group.
http://www.find-game.co.uk/16344-Son...sole-Black.htm
This guess this really is the end of the line for the PSPgo. I'm sure it the same story in Canada/ USA and Europe.
I will be ordering a white one.