I don't think that a professional appraisal will be that helpful to you for this. Getting opinions on value from members and some dealers or auction houses could be helpful. And it's possible that publicizing and auctioning it off in the area where your husband was on the air may attract fans of both the artists and your husband.
You may do better combining it in a sale of other autographs and memorabilia that you have, too.
Great question, Chad. I don't know the signatures well enough for all the names on the jeans to give opinions, but the ones I know look good to me.
They're signed in marker, so the autographs look close to what they'd look like on paper.