Not sure where to put this, so here it is!
I am currently having an infuriating experience with a few sellers of new, cheap A/V cables for SNES/N64/GameCube.
The OEM cables always seem to disappear and the aftermarket for reasonably priced cables is slim. Most of what you see seems to be made by a single supplier. The cables all look like the ones in this auction:
ebay Link
Anyway, the problem is that the LEFT/RIGHT channels are reversed. I've tried explaining this to the people that I've received my cables from and it is apparently a mind-blowingly difficult concept to comprehend. Flat out, none of them seem to care even a little. How you can do business like that is a little beyond me, especially when they know this is a B2B transaction as most people aren't buying 20 sets of cables for personal use.
So, if you've purchased anything like this in the past 1, 3, 6 months, or who knows how long, you might want to double check them. I used the stereo test on the NTF2.5 test cart rom.
I'm also taking recommendations for bulk A/V cables that don't suck