These are never seen on the used market and these have been barely used. The best interconnect we've found. We've made a switch to a fully balanced topology so this RCA interconnect can go to a lucky home. You won't find better reviews on-line. This is the creme of the crop in cable technology and the sound is a tremendously open window to the event. The Absolute Sound said this 'These technologies are all balanced to perfection in the “David” interconnection cable reducing or eliminating electromagnetic interference from the very low frequencies into the radio frequencies. The result is a cable design with performance so astounding it must be heard to be believed. Test ‘em and find out for your self just how good your system can sound. If you can find a cable with better performance you should buy it.' We concur.