That's funny! As I glanced down the pipes I saw that piece and my jaw dropped! Yea $300 sounds about right. Sucks when you want to use it for your art. Of course the base brings the whole thing together for artistic value and stability, just hurts my heart to think you would have to pay $300 to do it!
I'd use steel but it really causes me grief as most of my tools aren't adapted for it, the differential heating is tough on the soldier, and the long term rust issues when associated with brass suck.