I have a NOS 1960 Beckman-labeled select-grade Amperex/Philips 7316 (12AU7) with the large halo getter for sale. It is probably the best-sounding 12AU7 available at any price and would make a great input tube for the Sarah amplifier. I paid $275.00 for it but will take offers.

I also have two NOS MAZDA (labeled RT, Miniwat Dario) 6922/E188CC driver tubes for sale, which would complement the above fantastically for the Sarah. These have gold pins and are rated for 10,000 hours. I paid $475.00 for the pair but, again, will take offers.