Are there any autographs on the poster?
Any commemorative coins or cards included?
How big is the poster?
Was the poster sponsored by a company like Coca Cola?
Can you post a Picture of your Poster? You can use the paper clip Icon if you have a tool bar, or you can use Photobucket.com and post a link here.
The two Players on the poster were Joe Montana and Lyle Blackwood who was #42 of the Miami Dolphins. A piece like with what you put into it would most like sell for $125.00-$150.00. If it had an autograph, or had the added value of a Commemorative Coin or Trading Card, that would have increased the Value into the $250 range and up. This is based on Beckett Sports Cards and Collectables.
It sounds like it is a beautiful piece, but unfortunately the value of the posters have gone down with the decline of the economy. Even the Autographed Memoribilia is not bringing the price that it did back in the early '80's.
My husband and I have been collecting sports memoribilia for over 40 years and the decline in values have left most collectors reeling from the loss of value. Joan