Tubes for audiophiles get bid up in strange ways. I once bought a random
box of tubes on Ebay because it had a couple of tubes I needed in it. But
the seller tossed in all his junkers. Turned out that there were 10 or so
TungSol 6SN7s in the box-- dirty, but tested fine. I put them back up on
Ebay in the audio group and they sold for about $10 each.

30 years ago, I helped the University of Washington clean out the old
electrical engineering building and we tossed out 10's of thousands of
tubes in pallet loads. No one was allowed to scrounge, although some of
the professors packed away stuff in their car trunks.

Clean out your old dustbins-- might be cash there.
--
Steven D. Swift, , http://www.novatech-instr.com
NOVATECH INSTRUMENTS, INC. P.O. Box 55997
206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA