TubeNet

No clue... might be best for parts though, especially if the valves are good. If you could snag 2 or 3 beat up 186's, you may be able to end up with 1 tuba's worth of parts for a reasonable price (if you can do the repair work yourself).

tstryk... what on Earth did your Miraphone look like?!

At least you wouldn't have to worry about damage in shipping.

I've seen much worse!

That bottom bow almost doesn't seem like an accident. I would guess that somebody would have to really work at it to make it that flat.