A 1971 Pittsburgh Pirates Team Signed Baseball with the key signatures: Clemente, Mazeroski, Stargell, and Oliver is worth about $500.-$700.
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. 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.
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The Pittsburgh Pirates appeared in the World Series 9 times, and won 5 of them. You have to figure out what particular year the baseball is from.
Visit the Pittsburgh Pirates Team Signed Baseball Price Guide link I left below. The price guide features links to full team rosters to help you figure out what year the baseball is from. Searching for the players that played the least amount of time for the team will help you figure it out quicker. Once you have narrowed it down to one year the price guide also provides a list of key signatures for that year. These signatures are the most important on getting top value.
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.
If the baseball is from the 1960 World Series it could have a lower value based on condition. A clean white baseball would be most preferred to display the signatures.
Added value as a World Series game ball would be in your ability to prove so. A "Game used" baseball would have to be accompanied with provenance, and the quality of the provenance will dictate the added value. A letter from a player, team, or League official would be acceptable. A letter from a fan at the game would not hold much weight if any. Without provenance the added value will rely on the buyers belief in your story.
If the signatures are not properly authenticated the baseball could sell at half the market value or less.
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.
If the baseball was used in the World Series it could lower the value based on the condition of the baseball. A clean white baseball would be most preferred to display the signatures. Added value as a World Series game ball would be in your ability to prove so. A "Game used" baseball would have to be accompanied with provenance, and the quality of the provenance will dictate the added value. A letter from a player, team, or League official would be acceptable. A letter from a fan at the game would not hold much weight if any. Without provenance the added value will rely on the buyers belief in your story.
If the signatures are not properly authenticated the baseball could sell at half the market value or less.