Literally, no. It's all a marketing scam.
Best Buy makes very little money on the vast majority of the things that they sell. What they DO make money on, however, is stuff like HDMI cables. A lot of money. I worked at Best Buy for three years, and our discount was "Cost +10%." My price on those $100+ HDMI cables was around $4 and some change. So what does that tell you?
They hope that you'll buy the big HDTV that they make very little money on, and while you're at it they can whip three HDMI cables at you and make a profit somehow.
HDMI is also digital, which means that the cable either works or it doesn't. "Nickle plating, wrapped in gold, covered in diamonds, blah blah blah" doesn't matter. And I'm not saying that in the "Well, you need to be a true videophile to see the difference..." kind of way. It literally makes no difference because it's a digital signal. The video is nothing but 1s and 0s. It either gets from the Blu-ray player to the TV or it doesn't.
Moral of the story: never pay more than like $3 for an HDMI cable, unless you need one that's like 200 feet. Then you'll probably have to pay more.
Someone else can correct me if I'm wrong about this next part, but I believe back in the old analog days there was a pretty big difference. More expensive cables were generally of a higher quality. But that was analog. And those higher quality cables that they could charge more money for were still dirt cheap to produce. So companies like Best Buy developed a nice little racket selling those cables to people who wanted them with a price marked up like a million percent over cost.
And now, everything's digital. So expensive cables make no difference. But they had already fallen into the business trap of "Well, if we take a loss on the TV we can make it up on the cables!" And you can't just suddenly raise prices on literally everything you sell or risk alienating people. So those companies continue to sell their high priced cables that are exactly the same as the ones you can get for like $0.99 on Amazon.com.
Edited by MattAlbie60, April 24 2013 - 02:28 PM.