I think the average BMX crowd simply don't have the funds. I could readily see that as a steal with a Ben Franklin and a half but the BMX'ers with money will buy new. Then the poor folks out there will buy Wal Mart so you're really gonna have to just wait until someone with the appreciation of what you have will see the merit of their purchase.
Then there's the economy.
You're not alone. Those that want to sell their custom made road bikes anything over a thousand will sit and sit. But eventually someone will bite.
It's like fishing.
(edit) I see a one piece crank. If you had a three piece quality crank it may have sold already.