I just saw this on TubeNet. I DO NOT know the seller but thought I'd repost in case of interest.
http://forums.chisham.com/viewtopic.php?f=4&t=85559
$300 or best offer is a pretty good deal. Again, I don't know the seller. I own a 15I and it is a nice horn if you want a small bore Euphonium. They are built like tanks too.