How much is a 2006 uncirculated silver dollar worth?

If you are referring to a large coin bearing a picture of Miss Liberty walking, you have a bullion piece sold for its metal content, and worth about $17 at current prices. The denomination of these pieces is artificial because they're sold as precious-metal investments, not for spending.

OTOH if you're using the generic term "silver dollar" to refer to one of the small dollar coins carrying a picture of Sacagawea on the front, it's made of copper and manganese, and is worth face value only.