Julio's 30/30 homerun ball

First off, congrats to JULIOOOOO on hitting the elusive 30 homerun / 30 stolen base milestone for just the 44th player to do so!

Let's say you were the lucky fan who made that great catch on Julio's electrifying homerun. Would you hand that ball over to Julio & the Mariner's immediately? Would you ask for anything in return? If so, what's your starting point for negotiations?