how much would a silver dollar coin worth when it is made in 1807? over 200 years ago

There’s an auction on eBay now. Starting price 24.95 $

From what I’ve read it’s a morgan silver dollar. The year is 1893 and there is a small S printed on one side. We found it in my great grandmothers belongings. Here is a link to what it looks like. http://www.coinfacts.com/silver_dollars/morgan_dollars/1893_morgan_dollars/1893s_morgan_dollar_obv.jpg Thanks!