TubeNet

http://www.cerveny.biz/tuben/f_tuben/cfb_661_6m.php" target="_blank

Just stumbled across this and I vaguely remember reading a not so pleased review of this horn? Has anyone ever played this? Or the other 6V Cerveny F tuba the 851-6?
What did you think of these horns if you did play them, do you have pictures of the horns?

IIRC, the 661 had a very good sound, but weird intonation (gonna need the 5th and 6th valves a lot). Also consider the price... Not sure the last time that website was updated, but the new price back in 2010(!) was about $6,000.

These days, it'll cost even more, and there are probably a lot of other options available for less money. Could be a gamble.