here is a breakdown of casascius coins that have been redeemed or unopened.

[/quote]

This particular photo is a bit misleading due to the fact that there's a big difference between the brass 1BTC and the silver BTC as the silvers in general are much rarer and in higher demand. There's not nearly as many silvers 1BTC coins. I believe the number is said to be 1300 all silver plus an additional 700 silver with the golden/gilted B. So 2k of the 15K+ numbers listed above!
Hope that helps some!