Football Pennants; Any Value?
 

I have a 1971 Dallas Cowboys world champions, a 1972 Dolphins world champions, 1980 Super Bowl (Rams), 1971 Giants pennant with facsimile team autographs incl. Tarkenton. I'd say average kid-used condition.

Pennants value greatly depend on condition. Common issues like pin holes, missing tassels (if they had any), stains/discoloration, thin spots and tears can really drop the value. The Cowboys and Dolphins ones you mention are fairly common, so they would have to be pretty nice to fetch a decent price.

Is the Cowboys champs pennant the one with the old logo (Cowboy Joe), or is it the helmet type?

helmet