The fifth-oldest franchise in the NFL, the Steelers were founded on July 8, 1933 by Arthur Joseph Rooney. Originally named the Pittsburgh Pirates, they were a member of the Eastern Division of the 10-team NFL. The other four current NFL teams in existence at that time were the Chicago (Arizona) Cardinals, Green Bay Packers, Chicago Bears and New York Giants.
Charles Haley played on the most winning Super Bowl teams, with San Francisco, XXIII-XXIV; Dallas, XXVII-XXVIII, XXX according to Superbowl.com
There really is no set price on any Brett Favre cards.It all boils down to "supply and demand". Some cards are worth as little as 60 cents, while other cards are valued in the hundreds and even thousands of dollars. It depends on the rarity of the card (how many were made), who manufactured the card (Topps, Fleer, etc.), if it is a "game-used patch card" or "signature card", and many other factors. The best indicator of value of cards that I have found are Beckett price guides. You can find them online for online price searches, or pick up one of their price guides in any book store.
In the United States, football is played in all of the 50 states.