Dear lord. I can't speak for Robert Wood, Paul Detlefsen or Lazlo Neogrady. And I can't even begin to imaging what an actual Winslow Homer would be worth, but I think you should be speaking to actual art auction houses like Sotheby's instead of Yahoo. Hell, I studied Winslow Homer in art school.
Get them authenticated and appraised. If they are genuine, it'll be worth the investment. You have a museum quality collection.
