[ayc868]

Chimera Labs Advantage connectors are Oxygen Free High Purity Copper with Direct Flash Gold plated directly on the copper surfaces. Finally the audio connectors are sealed for 'gas tight' protection against oxidation. The effect of not contaminating the copper with other metals results in astonishingly revealing high performance audio interconnects.

for detail   http://www.chimeralabs.com/chimera_labs_advantage_audio_cables.html
http://www.audioreview.com/cat/cables/speaker-cables/chimera-laboratories/series-ii-interconnects/PRD_136061_1584crx.aspx

used for  around 3  years will sell for 55% of their list price