Total BS onthe hype even these so called10,000 tubes that’s not realistic under laboratory perfect circumstances, that’s made up ,even if a tube could play that long it’s far past it’s optimum .I have had tubes since the 1970s .
these rare tubes youtruly don’t know if they are matched, or even used unless
you have a tube tester.tube sellers put out ads and buy these from all over the world in lots from people’s garages cellars used in equipment .
believe inly1/2 of what you read . I have been there done that ,and true vintage tubes are getting more rare ,anything NOS will be a premium over $500-$1k a pair
such as these Tele tubes mentioned ,