Regardless how you want to spin it, MSRP for Nintendo games, aside from those four that made it to the budget line up, never reduce in price. This is fact.

Yes. Amazon is running a video game deal of the day for Metroid the Other M for $20. What happens when you miss the 24 hour sale? It's no longer on sale? You can find any game on sale if you wait long enough(I got Tactics Ogre PSP on sale a month after it was released, Yakuza 4 was released at $39.99 at Best Buy, etc.) Doesn't mean the MSRP isn't still higher and the fact that MSRP is just what it says "suggested retail price." Undercutting your competition usually means more business. Walmart used to do it, and now that they have everyone thinking that they're lowest priced, they jack the prices up to higher than what you'll find in most locations(that and Sam Walton is dead.)