Look up a company called PSA

They do PSA-DNA authentication and it will up the value of your memorabilia cause many hardcore collectors need some sort of assurance that what you say happend, happend.

Its a small fee but I would find a place to take it in person obviously. Sometimes PSA will be at a local card show giving deals for their service.

Many people send in cards to get graded by them they are the best company by far.

Otherwise, any true collector won't be able to give oyu as much money cause theres that thought it isn't real