Never noticed this. The only time I buy from Best Buy is when I am truly desperate; buying from Amazon with overnight shipping is always cheaper, and there is much better selection.
That is really the least of my concerns. It's just that Best Buy only tends to sell the very lowest of the low-end stuff, but marks it up to high-end prices.
This is true of almost all retail stores, which is why I pretty much only shop online now. The brick-and-mortar stores want to blame sales tax or too-low online prices for their woes, but the reality is that they only sell crap. Most people do not want to buy crap, and don't. As a result, the brick-and-mortar stores that only sell crap are not doing too well compared to the online stores that sell things people actually want to buy.
(Notice how Apple's retail stores do fine. This is because they actually sell good products.)
That's not true. Best Buy sells plenty of quality merchandise. They've got the same TVs, digital cameras, etc. you'd find highly recommended on Amazon or anywhere else. Their Xbox 360 is no more failure prone than anyone else's.
Their computers range the gamut, but so does Dell.com. Most Best Buys now even have an extensive selection of Macs on their own wooden table. They've got every mp3 player worth considering (and many not). I bought my Diamond Rio there back in what must have been 98 or 99.
Amazon sells most electronics for about the same price as them. I just looked for my camera, the Cannon Powershot. $149 for the newer model at both places. (Perhaps time for me to upgrade).
It's really the sales tax that ruins the business case for shopping there. A copy of Halo is $3 more at Best Buy, and I have to wait in line. When my business bought a Macbook, we saved $100 buying it from Amazon. I could have gotten the same thing off the shelf at Best Buy or an Apple Store, but why pay extra?
And the computers I wouldn't buy there due to lack of customizability, which was the original point of the comment. Even my dad just orders them off the net because of that.