Let's say 6 ft. for comparison sake. Before reading the next sentence, what do you think the lowest and highest everyday price is on amazon for a new working 6ft. HDMI cable? (Hint: You're a little high on the first and way too low on the second.)
The price range is absolutely astounding, any where from $3.00 to $50,000 with shipping. That's a factor of > 15000X! You think a $310 haircut is pricey, how about a $310,000 one? I've bought a bunch of .50 (plus shipping) ones and they can break if treated roughly for sure. But I'm not sure I could pick one from a $50 cable in a blind test, can you? What's the most you would let your customer pay and what's the most you would pay for your own use?
Is it common for home automation installers to charge > $100 for 6ft cable? Can anyone justify it? Is there a society of audiophiles turned securiphiles that can be milked tapped for big bucks? Here are the extremes.