I have a few raytheon 6SN7-GTB that are in matched quad packaging that
were removed from various church organs. What are they used for and
what are they worth? And guitar amos use these? Thanks ...M.M.

Octal tubes of that age typically range 3 to 5 $ when new. But you are lucky as the 6SN7 is one of the tube which falls in the "audio" category. That is the category of the hi-fi aficioados who believe that tube audio amplifiers are better than the solid state one, and are prepared to pay quite a lot for them. That is the reason why US-made 6SN7s are typically sold 15 to 20$ when new.

I would advice to advertise your tubes on e-bay in the section dedicated to hi-fi aficionados, not in the electronics one.

The used audio tubes price could be close to that of new tubes, as those people do not understand the difference too well. Insist on the fast that the used ones are better than the new ones, as they have been thoroughly tested.

Stress a lot that they are matched, and that they are US made, not coming from eastern countries.

Also, try to find some distinguishing feature of your tubes, like "dark grey plates" or "brown socket" or "very bright label" etc.

Moreover, state that the Raytheon 6SN7s are well known to produce the warmest sound of all 6SN7s in the world.

Sell then in pairs, not in quartets.

So doing, you may end up to 50$ a pair if you are lucky.

Good luck

Tony I0JX