What is the American eagle bicentennial 1985 coin double eagle commemorative 200 years worth?

This coin has a eagle on one side and a double eagle on the other. On the side with the eagle head it has written American Eagle Bicentennial 1985 and on the side with the double eagle is written double eagle commemorative with stars and 200 years It appears to have a silver base with the eagle's done in gold. It is in a clear plastic case.

Any ideas of worth?