Watch out for this guy:

eBay User ID: ndtreasures2000

http://search.ebay.com/_W0QQsassZndtreasures2000QQhtZ-1

Among other reasons he seems to get negative feedback, he ripped me
for a Turbo Duo AV cable a while back. One like this-

http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&category=4315&item=8175260967&rd=1

What I received was a really cheap(almost dirty looking metal
connections) cable that only displayed a blurry distorted image.

After I e-mailed him he was really rude and basically told me that I
didn't know what I was talking about, made it clear that any attempt
to leave him anything less than positive feedback would result in
retalitory negative feedback(one of these sellers that only does
blackmail-feedback) and never responded after that.

It gives the same crappy image on SMS & Genesis systems as well.

If anyone is looking for replacement Duo AV cables, you can just use
a Midi to RCA/Composite cable.

I bought mine from Radio Shack and the picture display is a little
better than my original Turbo Duo cable.