(Also not an ad)
While browsing DealExtreme the other day, I happened across similar offerings at similar pricing (the base cost for a given number of cables at DX is greater, but with free shipping, the final cost comes out to be on par or better -- for example, the per-cable cost of 500cm extensions is about 3 cents cheaper at DX).
http://www.dealextreme.com/details.dx/sku.11986
http://www.dealextreme.com/details.dx/sku.11987
http://www.dealextreme.com/details.dx/sku.11984
Notes:
-> one of my friends ordered some LEDs from DX, and seemed satisfied
-> from reviews, DX is legit but their shipping, while free, is apparently _slow_
-> "bulk" pricing starts at 3 or more of the same item
-> I haven't ordered any cables from DX (yet), so I can't say anything about their quality