I've noticed that there are a large number of sellers of so called "high end" interconnects and speaker cables, not to mention fancy feet and even a "cryogenic" service that offers to freeze the insides of your equipment for a ridiculous fee.None of this stuff can have any benefits (freezing can actually cause damage) and they are only intended  to relieve the gullible of excess money. All interconnects will sound the same (unless they are poorly made or unscreened, when they will sound worse) and for speakers just use the thickest cable you can find, don't pay for a fancy make.