[sb32]

Forgive me if this has been covered, but couldn't find it searching the history. I'm new to collecting vintage on card autos and had a question on the best way to determine fair prices when buying. Is it the value of the non signed card plus the cost of the auto on a generic item like a ball? Some cards don't come up that often, if ever so tough to find pricing history. Is there a better way? Any help would be greatly appreciated.

Thanks.