It's also possible the tubes you've found are not worth the trouble even if they test perfect. Of the thousands built, only a double handful remain popular in high end audio.
If you list what you have, I and a dozen others here at Audiogon can tell you if they are desirable. If they are desirable it's worth testing them and putting up for sale or keep for yourself.
If you list what you have, I and a dozen others here at Audiogon can tell you if they are desirable. If they are desirable it's worth testing them and putting up for sale or keep for yourself.