Out on the 18th of May. This is currently the best pre-order price and a damn good price for such a collection. If you look at the Sly Trilogy that is still hovering around a similar price point almost two years on, so this is a good price in that it is what it will be a bit on from release. Jak and Daxter is closer to the £26 mark a little over a month from release.
This is a preorder, and this is currently the best price out there - if for whatever reason they lower the price to MGS levels (£20.33!!!) you will be charged the lowest price.
Can't wait for these - finally my PS2 platformer collection will be complete! Ratchet 3 will have its MP element intact too, so more joy all around!