The current Interceptor is nothing like the original.....look at it that way.
Right now, the value of kits, even the older ones on ebay are not the same as a year ago, why, the economy.

The hobby has been around for 50 years now, and, I don't think that saving the older kits would be foolish, on the contrary, if a "model rocket museum" were looking to fill out their collection, then, you could donate them, sell them or at least let them borrow them with the understanding that they would come back to you.

The Smithsonian has a good collection of rockets from the Stine collection housed in the garber Facility in Maryland, which will eventually be move over to the Dulles facility.

Look at it this way, Why do we have museums..........to protect the past for future generations.