Oh gosh--that's awesome. The design is unique and the specially pieced back makes it even more valuable.
I have a hard time pricing stuff... but for that size and workmanship and uniqueness I'd go $250 minimum. Start at $300. :wink:
Where to sell is the biggest problem. I find once I have a few buyers, they come back. Having photos on my website helps a lot--for potential buyers to see what's available.