Around £20
what is the value of EdwardVIII signature
$30
$80
$1.00
8000$
Signed Baseball Cards vs Un-SignedA signature does not increase the collectible value of a baseball card. Once a card is signed the signature (not the card) becomes the collectible, and holds the bulk of the value. The baseball card is used to display the signature, and the value will be effected by how well the signature is displayed.In general, collectors of baseball cards would rather have a baseball card without the signature. The signature would be considered as a flaw in the condition of the card and will lower the value of the card as a collectible. If the signature has a lower value than the card it will lower the value of the card. The un-signed card will have a higher value.This is why it is not a good idea to have an expensive card signed. Signatures have a higher value on a baseball than on a card. Signed baseball cards sell at about 10-30 percent the value of a signed baseball. The percentage will vary based on the popularity and rarity of the signature.
35.00
Autographed Cubs YearbookYou did noy mention the year of the yearbook or who signed it. In general if the cover is signed by a player it would be considered as a flaw in the condition of the yearbook, and the value will then rely on the signature. The yearbook becomes an item to display the signature. Value will vary based on condition, and the type of authenticity that accompanies the signature. If the signature is not authenticated it could sell at half the market value or less.
The Christy Mathewson's "Big Six" Indoor Baseball game is worth about $750. - $1,2500. in excellent - near/mint condition. Christy Mathewson signatures are rare and highly sought after. On average a Christy Mathewson signature can sell between $8,000.-$12,000. Not too many signed baseballs found, and most of the auction I viewed were for signed books selling as high as $26,000. A cut signature could sell in the $2,000. -$3,000. range. Because the signature is on the back it would be valued as a cut signature. If it were on the cover, it would make a better display, and raise the value. The condition, and the type of authenticity that accompanies the signature will be a factor on value. If the signature is not properly authenticated it could sell at half the market value or less. The signature, and the game have a higher value if sold separately. Problem is, the signature is on the back of the cover and cannot be displayed at the same time. This will lower the value of the signature, or the game significantly. As it is the game with the signature on the back of the cover, it might sell slightly higher than the unsigned game or the value of the signature, and not the full value of the game, and the signature added together. I'm not familiar with the back of the cover. It is possible that the signature is a facsimile, and is part of the printing on the game.
Major League Baseball more DesiredThe value of a Signature on a Major League ball could have a higher value than a signature on a "regular baseball" but the value will ultimately fall upon the quality of the signature, and the type of authenticity that accompanies it. A Major League baseball would be more desired for the signature resulting in a higher value. The condition of the ball would be a larger factor on value overall. Because the Major league baseball is more desired it doesn't always translate into a higher value. The signature, and how well it displays dictates the value.
If its an authentic signature and it checks out by an authority on historical signatures then yes, it most definitely increases the value.
700