Interested in selling my ZDS #137. It's in perfect working and cosmetic condition, part of the last run made last year. For financial reasons I have to let go of this amazing amplifier. It was taken very good care of and gave me a lot of enjoyment, and I hope the next owner can have that too. Asking USD 2600 (PRICE DROP - 2400). It will come with the Amperex Red Base 5691 pictured, will include original shipping box, power supply and cables, receipt, instruction manual, and receipt for the 5691 tube from thetubestore.com. Prefer to sell to folks local to Edmonton, Canada. Willing to ship to USA and across Canada as well, but please know that shipping isn't cheap (in the $100 range). See pictures and feel free to ask me about the amp any time. Thanks for viewing.