A Robin Roberts single signed Baseball is worth about $45.-$65.
Value is based on average prices of recently closed auctions. Prices may vary based on condition, and the type of authenticity that accompanies the signature. Signatures that have not been properly authenticated could sell at half the market value or less. Add for inscriptions. Collectors will pay more for inscriptions such as "HOF" and pay less for personalized inscriptions like "Good Luck Chuck" In a recent auction (Jan. 2008) a Robin Roberts single signed baseball sold for $65.73 For more prices on single signed baseball see Related Links below.
A 1954 Topps Jackie Robinson baseball card number 10 has a book value of about $400.00 in near/mint -mint condition. Professionally graded cards will sell for more money than a non-graded card in the same condition. With the value of this card it will pay to have the card graded. It could double the value or more depending on the grade given. Condition is important.
Common flaws with baseball cards include: rounded edges, creases, off centered, and faded color. Any or all flaws will devalue the card significantly.
Recent autions for Robin Roberts signed cards show a range between (buy now) $29.00 and $55.00 depending on the card company, year of the card, and shape the card is currently in. (1-10 mint)
A Robin Roberts single signed baseball is worth approximately $69 if it is on a Rawlings Official Major League Baseball and is signed on the "sweet spot".
These values assume that they are all authenticator by a reputable company. An autograph that isn't properly authenticated can be worth as little as half of the value of an authenticated signature.
I would estimate approx. $25.00 - $50.00
A Robin Roberts autographed Hall of Fame Postcard is worth about $35. -$50. Prices may vary based on condition, and the type of authenticity that accompanies the signature. Signatures that have not been authenticated could sell at half the market value or less. The display, and how well the signature stands out in contrast to the postcard will be a major factor on value.
$250
$1200.00
In the low 1,000s
On Amazon, Vin Scully autographed baseballs can go for as much as $295.80
About $1,000 to $3,000
Anywhere from $20 to $40.
$50
$800,000,000
Close to $300
The autographed baseballs are valued at a price between $40 and $60. The exact price will depend upon the condition of the baseball and when it was signed.