For sale is my R2R DAC R-1 from Audio-GD, including fully discrete native DSD decoder, 7 mode selections on the front panel (4 NOS modes + 3 oversampling modes.) Has 500 hours burn-in and in perfect / mint condition.
Full Clocks upgrade version (Femtosecond Accusilicon *2 upgrade the stock clock and Femtosecond Crystek *2 upgrade on USB interface) purchased in 2020 for $889. Has newest firmware version and comes with shown USB cable plus standard power chord and original box. US/Canada only and shipping will be around $50.