I just took a look at the National list of autograph tickets.
http://www.tristarproductions.com/National/tickets.html
Take a look at Frank Robinson for example. $229 for a regular ticket, and $39 for an inscription ticket. It says that you can pick a career achievement but
no personalizations.
Why ban personalizations? Forgers have it so easy now. All they have to do is execute the signature and maybe a number or two.
The industry has picked up some pretty bad habits over the years, IMO. This isn't the way autograph collecting was done in the past.