You probably won't see any ridiculous deals - in Canada most stores have promos for it at $139CDN. (approx $120USD, 94EUR or 64GPB) That's about as cheap as I expect it to go until boxing day, where various stores will probably have special deals on it.
I've seen many stores selling it at full price ($149CDN), but hawking a free game with it - I've seen bundles with Pokemon Trozei!, New Super Mario Bros, Clubhouse Games, Starfox Assault and Mario Hoops 3-on-3.
Basically, you're not going to find it for a whole lot cheaper than it sells for now.