I would like to discover the value of my signed Oakland A's baseball, thanks?

The baseball i have in my possession is a 1985(correction, earlier i accidentally said 1995) Oakland A's ball with 33 autographs on it, it was my grandfathers and i would like to know the value. Some of the other signed base i have seen on the internet that don't even have as many signatures go for around 800$ and i am just a little curious. it has a few scuffs but i would just like to get a guesstimate from someone into sports memorabilia, thanks.