I have a bunch of valves I've collected over the last 18 months, ECC81, ECC82, ECC83 and KT88s. Some from dealers and some private sales/ebay finds.
Thinking about maybe selling some on but I've no way of testing them so can't state their condition to a potential buyer.
Can anyone recommend me either a valve testing service in SW or W London (would have to be drop-in as I don't want to post them) or a friendly AoS member with tester who could spare me an hour for a couple of beers?