An autograph that is not authenticated by a creditable company could sell at half the price or less than one that is. Two of the top, and most trusted authenticators are PSA/DNA, and James Spence Authentic (JSA). Collectors will pay more for signatures authenticated by either one.
It may sound odd but in some cases PSA/DNA, and JSA authenticated signatures may sell higher than a Letter of authenticity from an unknown or less trusted authenticator that witnessed the signing even though PSA/DNA, and JSA did not. It's just a matter of collectors trust, and collectors will pay more for it.
Check the respective websites Show Schedule to see if they will be in the area that you live. They also do business through the mail. Before spending money on having the autograph authenticated do your homework. Find signature on line that have been properly authenticated, and compare them to yours. If you feel comfortable that it is authentic then proceed. See related Links below for the websites of both Authenticators.
Assuming you mean Dizzy Dean the baseball notable, he married Patricia Nash, but they had no children
"Dizzy" Dean
Dizzy Dean died July 17, 1974, in Reno, NV, USA.
Dizzy Dean was born January 16, 1910, in Lucas, AR, USA.
Priceless
Dizzy Dean is one of the best pitchers in The MLB
No.
Dizzy Dean
Dizzy Dean and James Dean were not directly related; they belonged to different fields and eras. Dizzy Dean was a famous baseball pitcher in the 1930s, while James Dean was an iconic actor in the 1950s. The similarity in their last names has sometimes led to confusion, but there is no familial connection between the two.
Dizzy Dean
Dizzy Dean is 6' 2".
Dizzy Dean is 6 feet 2 inches tall. He weighs 182 pounds. He bats right and throws right.