Price is available both online and instore at GAME. I tried searching the Gamestation website but they didn't have the collector's edition. It's available instore though.
Ratchet and Clank: A Crack in Time Collectors Edition includes:
-Ratchet and Clank: A Crack in Time the game
-Downloadable content: Discovery Package Explore the Insomniac Moon, a special level that resembles the layout of the Insomniac Games' offices! Scattered through this museum-like level, you will discover a moons worth of extra content that didnt quite make it into the game. Exclusive to Collector's Edition