Franklin Mint is a con. They make people believe they are buying special items but they won't be worth anything for at least 50 years. They are still mass produced rubbish in a posh box!
I think you will need a professional appraiser come look at it for the most accurate price. Here's something that might help you find one closest to where you live. Good luck!
That would be the enthusiasts website! Best I could find. That's pretty close though And off course ebay has got sellers advertising with photos of the boxes