There is new Tangled items in the StarPlaza and I have a feeling that this stuff will be worth a lot once it's out of the stores.
Many other things that have come and go in the starplaza or the theaters that are worth a lot---look at the prices of the enchanted stuff, most people would pay well over 100sd for the enchanted wedding dress. Most of the movie merchandise like the Navy Wizard Robe are looked for and people are willing to pay a lot of money for them.
Looking at the other stuff that is highly priced that is based off of movies' items I think it's save to say that the longer you hold on to stuff like this the more it will be worth.
I think it's a good investment, so I would shop away! :)