I disagree. It's been my experience that Amazon very rarely has the lowest price. They prefer to charge higher fees for listing than places like Ebay and hope people choose Amazon just due to brand recognition.
Amazon is good for the occasional sales, stuff that’s hard to find locally, or stuff I need quickly. That’s about it.
Yeah, and their website isn't even that good to boot (search sucks, for instance). I think they're coasting based on customer inertia and market dominance.