Posted By:
Dan BrettaDepending on condition - unused ball (no sigs/no gameplay), still creamy white to off white, with bold stampings - I would say $400-$500. That's for the Reach Official League Ball with the Brown Box. It's a cool baseball, but it is not uncommon. If it were an official American League ball in the box with the same condition it would be valued around $800-$1000 for a 1920's model.
If you pick the collection up post some photos here - I love old baseballs.
edited spelling.