It tops out at $20,000 but some of the signatures are faint.
I just finished my 3000 hit bat that I lugged around for 40 years.
Jeter charged me $600 for the signature which is the highest price auto that I ever spent. I was hoping that ARod would fall short at 2900+ so I wouldn't have to worry about others. Hopefully my son will continue to add to the bat over the next few decades.