Hi-fi systems get up to prices that are unbelievable. It's perfectly possible to pay £3000 for a record player, and the real buffs do so without flinching. Once you get to a certain price range, then the 10% that one is supposed to pay for the interconnects and speaker cable comes to a lot of money. those riser things look like snake oil though.
NB - I am not excusing these people's idiocy, but they probably think that paying over a grand for a bike is equally odd.
The trouble with some of the Hi-Fi "enthusiasts", is the arguments they use. Gold plated mains plugs for example (and there are some £70 gold plated IEC plugs on that site), unless you've got a gold plated wall socket, and associated gold plating all the way to the power station, seems a bit pointless. Someone already mentioned directional cables, which you can pretty much prove must be non-linear if they actually are directional. Don't get me onto coloured markers around the edge of CDs to reduce light scatter...
How many music buffs or musicians spend thousands on their hi-fi? These sort of things are for people with more money than sense, like people in Porsche Cayenne's! Still, I just wish I was the one making that stuff, the profit margin must be huge.