i know this all to well with tickets as we don't use all our days in disney and universal, and last year when we went with my brother in law we stayed near i drive and there's quite a few booths that say they buy tickets with unused days and he took our tickets and there tickets on the last day and came back very shaken as he said a group of police officers just pounced on him and the booth and put him in the back of the car and said that they had been watching the booths as its illegal to sell the tickets and after a talking too and taking the tickets they let him go so yes it is silly that you have all these days on the tickets that don't get used and you wish you could keep them for the next time you go but than the parks wouldn't make there money.