When I bought my Genz Benz Streamliner a year or so ago, I bought three backup tubes plus another for swapping from Doug's Tubes. Never used them and the Streamliner was sold. These are ready to ship: (From left to right in photos below) 1 - Electro Harmonix 12AY7EH (this one was for tube rolling) 1 - Ruby 12AX7ACZ-HG 2 - Ruby 12AX7AC5-HG Retail value not incl. shipping: $68.80 Your price: $35 shipped CONUS, PayPal only. Thanks for looking.