Killzone 2 bundle not selling too hot?

[dolemit3]

I was searching Amazon.co.uk for a nice Uncharted deal (11 pounds in the UK while it's still $60 in the US) and happened to come across this:

while Killzone 2 the game is #1 on this chart even though it's out of stock. It looks like this bundle will not give much of a boost at all.