Having recently changed amplifiers I kept my best valves which I brought to upgrade and am selling those that I no longer need.
Matched Pair PsVanne CV181-T2 / 6SN7 Reference series Black Bottles (I believe these are no longer available) an excellent natural and musical sounding valve one of the best, about 350 hours on them, just about bedded in.
£160 for the pair plus P&P (new equivalents are £200+ for a pair and not as good IMO)
I also have a spare matched pair of PsVanne 300B T2 Reference Black Bottles that I might be persuaded to sell.
PsVanne CV181-T2 / 6SN7 Reference series Black Bottles below:
Box
Box
Matched pair of Reflector 6H23N-EB (replacement for ECC88/6922 valves), about 350 hours on them
SOLD - £60 for the pair plus P&P (about £100-110 for a new matched pair)
Taken from Watford Valves:-
"The Reflector 6H23N-EB is a Russian super premium 6922 that was made for the Russian military. The valve was designed to be immune to shock and vibration and these valves were internally ruggedized. So this gives the valve the lowest microphoney of any 6922 type. This valve has plenty of deep musical bass definition which is very detailed and rhythmical. It has a very musical and transparent midband which is excellent on vocals and strings. The top end is also very clear without the hardness that is common in all the current production ECC88/6922 valves. The 6H23N-EB major strong point is that it excels in detail, speed, and soundstage."
Pair of EDICRON 5U4G valves, these are virtually un-obtainable, they are a very good stable valve
£30 the pair plus P&P, I would estimate around 500+ hours of use.