I'm looking to buy a Saturn SVIDEO cable, a Dreamcast SVIDEO cable, and a Dreamcast VGA cable. I'm not too picky; I'll take a Pelican or Performance brand; anything. If the cable sucks, I'll rip it apart and make my own from the console-side connector.
Other things I may be interested in if you have them:
SVIDEO/Composite to VGA converter
Composite cable for Genesis/Megadrive I
Composite cable for Genesis/Megadrive II