Jebsmith73, You are incorrect of the used market values of the cables you have specified, my values corrospond to my archives that I have been keeping since 2012 from the watch list of audiogon,The Tara Labs cobalt power cord is $5,000.00 new retail, with oyaide terminations it is $5,400.00 6ft, used market for cobalt for 6ft is $2,300.00 to $1,900.00 depending on which cobalt power cord you buy, The Tara Omega Gold is $24,500.00 new retail 8ft, on the used market $11,000.00 to $8,000.00 depending on if you get a Regular Omega pair of speaker cables that does NOT say Gold on the cables, alot of people try to pass these speaker cables as Omega Gold cables, THEY ARE NOT!, they are the first Tara labs Omega speaker cables built, The Omega Onyx speaker cables has more performance than this cable, The Tara Zero Gold, depending when it was made!, The first version had a much smaller box called floating ground station,it said the Zero, this is not the same as the HFX grounding station, the station before the box that said zero was a grounding station that said Tara labs on it which was inferrior to the box that said zero, so now we have three different versions of the Tara Labs Zero Gold that new full retail cost $15,950.00 to $14,500.00 depending what country it is sold, now the used market for the Zero Gold can range anywhere between $5,500.00 to $8,000.00 a meter!, this depends on which version you buy, they do have different performance from one version to the other, Jebsmith73 I paid nearly $7,000.00 used market for my Tara labs Zero Gold 1-meter Balanced I/C, the cable was one year old, I had a relationship with this cerified Tara Dealer to get this cable at this price because of the age that with the serial numbers Tara Authenticated this Tara labs Zero Gold WITH HFX ground station before I bought it, only select Tara Labs dealers are allowed to sale such a cable, currently all the cables you are talking about here has dropped used value by a little bit, considering the introduction of the new Power cords By Tara labs that Is not on their web-site yet that any one can buy now, they are the new Cobalt AC Reference power cord, The new Omega Evolution AC power cable, and The new flagship GrandMaster Evolution AC power cord,, currently, The Tara labs Zero Gold and Omega Gold cables are third in the new line up, however, according to Tara, these cables are subject to be dis-continued soon, the new two top models of Tara labs is the Zero Evolution I/C and matching Omega Evolution speaker cables, and the new flagship cable system is called the GrandMaster Evolution I/c and speaker cables, Tara labs also introduced much more new models in their line up that I did not specify here, all these new cables are driving the used market down for the cables you mentioned Jebsmith73, The Tara labs Onyx I/C and Omega Onyx speaker cables have been dis-continued nearly a year, this model on the used market would be a great buy for what you pay for it now, also this model out performs most other cables on the new market, cheers.