Up for sale is my FEA Labs Opti-FET. No need to say anything about these. Mint condition, velcro on the back. I don't have the box. I always consider trade offers. Please message me if you would like to make one. As far as other comps, I might take a pile of cash plus an Empress, Daring Audio Phat Beam, or Okko Coca comp. $270, shipped. Please contact me with any questions. Thanks!