I have 2 pairs of Upscale BHK Select tubes for sale.
1 set has ~400 hours, the other less than 50. All 4 works fine and are quiet.
These are only available when purchased with BHK preamp from Upscale.
Asking $70 for the pair with more hours, and $80 for the lesser used.
PayPal and shipping included conus only. I guarantee them and will refund if you send them back within 15 days.