Ted Williams Gift to Walt Masterson.. 770 Springfield RIfle To - What's it worth?

SO this is a Winchester 770 Springfield 30-06 owned by Walter Masterson - given to him by Ted Williams in the 1970s when they were both inTexas (hunting hogs). Some of the letters to authenticate the relationship. I haven't dug-in deep in the model & serial #G941678 yet to look up the significance of the gun itself, and I am not a baseball fan... What would you do to market & sell this strange piece of history?