TubeNet

http://www.ebay.com/itm/Knopf-6-valve-F ... 33a94fc74f" target="_blank Wasn't this on a couple of days ago for $4000?

Here is one that looks like it that just sold out of CA for 2500.

http://m.ebay.com/itm/6v-German-Knoth-F ... nav=SEARCH" target="_blank" target="_blank

Here is the same horn by the same seller for 4k
http://m.ebay.com/itm/Knopf-6-valve-F-t ... nav=SEARCH" target="_blank

The braces appear to be Alexander.

Let me explain so answer any questions, as this is my horn, when i bought it for 2500 the original seller lied saying that it was in working conditions, none of the rotors moved and the leadpipe was not even soldered correctly, luckily the damage wasnt so terrible that it was a lost cause, after swabbing and reassembleming the rotors and replacing all the springs and soldering the leadpipe back on it turned out to be a really REALLY good horn, but now im really interested in buying a B&S 56aft so im trying to sell it considering it actually plays now i decided to go for 4k, as well as my bill bell model and some other equipment to try be able to afford it. My alexander 154 F is going to take longer than i expected to get back to me so instead i bumped it up to 6k, not because i expect to get that much but say someone really wants it and is willing to humor me for that price im not going to deny them the horn. Call it what you will but im just trying to keep any opportunity open. That being said, any tubenetter that is seriously interested in it,the price is $4000. its a really good F with a nice "vintage" sound, I just find it easier to part with than my Alexander.

This is where "or best offer" is useful. Looks like a cool tuba!