Nice find. This type coin has been made by the US Mint every year since 1986. Assuming that yours is still in as-new condition, it's actually one of the better dates in the series.
The link below is a listing of all 1996 eagle dollars currently on eBay. As you can see, there aren't many.

http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&catref=C6&from=R10&fstype=1&satitle=1996+eagle&sacat=15903%26catref%3DC6&sabfmts=1&saobfmts=insif&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=1%26fsoo%3D1&coaction=compare&copagenum=1&coentrypage=search