Some Value Help with A Couple of Tough Boxing Items
 

Hi guys. I'm hoping someone can help me value a couple very tough boxing autographs.
The first is a signed fight contract. The signature I'm trying to value is Oscar Bonavena. The second item is a photo signed by Joe Frazier and his manager Yank Durham.
I can't find any offerings of either Bonavena or Durham online to get an idea.
I'll try to post scans later.

Thanks, Jim.

The Bonavena could have some value depending on the fight and if it is actually his signature and not manager signed. Can you post a photo of the Bonavena with a close-up of the signature?