As far as I can tell most sales don't seem to include the fact that they include all bitcoin-forks since they were so early on the blockchain?
I'm not complaining as a buyer, but someday people will figure out these have value.
EDIT: I'm talking in general, not this specific post.
The premium value of cas coin especially those brass coin is pegged to fiat value. The price in BTC will be lower as long as BTC value keeps rising and vice versa. And also there are sell-off of casascius recently and it results to too much supply in the market with a low premium coins. Maybe after 2 to 3 years. Casascius value will go up again.