Is this Babe ruth autographed base ball a good investment?

No, absolutely not. The ones that you see selling for $70,000+ look brand new. Here's an example of one that would sell in that range: The one you've linked is barely legible. Baseball autographs are largely a function of: Authenticity; Condition; Rarity; Demand. read more

The one you’ve linked is barely legible. Baseball autographs are largely a function of: Authenticity; Condition; Rarity; Demand; Babe Ruth will always score high on Demand. His signature is not rare - he literally signed thousands (if not tens of thousands) of items throughout his career. The signature you’ve linked is authentic. read more

Ruth single signed baseballs that are not autographed on the sweet spot are the anomaly here. The vast majority have Ruth on the coveted sweet spot, so this is typically a non-issue. In closing, Babe Ruth signed baseballs and all Ruth autographed memorabilia, will always remain in high demand. read more

For example, Babe Ruth is one of the most sought after autographs in the hobby today and a single signed baseball of his could be auctioned off for $60,000 dollars or more. read more

Babe Ruth autographs are just as highly sought after, as his baseball cards. Signed checks run $5,000-$7,000; sometimes more. High-end signatures, especially single signed baseballs, frequently surpass $10,000 or more. read more