A local band director sent me a fb message asking if I have a tuba for sale:
full size / front-action / case incl. / under-$XXXX
At first, I was a bit miffed, because "$XXXX" wasn't very much money.
After an hour or so a question occurred to me, so I sent back this message:
"Does it have to have four valves?"
bingo. I knew where this was sitting. I acquired it, took out some creases and dents, touched up some lacquer, & rounded up a mouthpiece.
bloke has money in his pocket, and the band director has a nice new-to-him (probably 45-year-old) American-made front-action piston tuba with titanic case(s). The band director is happy; bloke is happy. Sometimes, you just gotta ask the right questions.