What is the value of an autographed 1954 Washington Senators baseball?

Depends on who has signed it - A 1954 Washington Senators Team Signed Baseball with the key signatures: Vernon, and Killebrew is worth about $175.-$250. Value is based on average prices of recently closed auctions. Prices may vary based on condition, and the type of authenticity that accompanies the baseball. Prices may also vary based on the amount of signatures, and key signatures acquired. The more complete the baseball with key signatures the more valuable. I don't have information on a recent auction for a 1954 Senators team signed baseball. The price above might need to be up-dated but should be close. If the signatures are not properly authenticated the baseball could sell at half the market value or less. For more information on team signed baseballs, links to full team rosters, key signatures, and price guide visit the following page from the link I left below.