Re: Not just business
Some fifteen years ago when my son was a teenager he saved up to buy a DVD player so we went off to a popular high street electricals superstore that's possibly been mentioned above. The salesman offered a regular HDMI cable for £9.99 or a premium one for £29.99. He pointed out two TVs on display, one with a noticeably better picture than the other, explaining that one with the better picture was through a premium cable. I repeatedly declined both (having a drawerful at home) until he gave up and while he was getting the DVD player I took a quick look round the back, confirming my suspicion that the good one was on a vanilla HDMI cable and the bad one on an RF output.