Carl Sagan also owned a 911 in orange, this adds to the man being a Porsche fan.
This 914 has been unlucky in that it has not been loved since the man passed on. It has been loved but not made it to be a devoted project. I think that it deserves to be fully restored and shown. It would do well if it was in Europe, at events such as Goodwood, not on the track, as an exhibit.
Heritage is really important with the Goodwood type of scene. Those Ferraris (and Porsches) that are worth untold millions do get raced, crashed and repaired. They are not garage queens and if they were taken out of circulation and made into garage queens then they would not command the sums they do. Legends like the McLaren F1 are legendary because you can see them get sent round the track at Silverstone, if they didn't do that then the cars would become antiques, of interest only to museums.
Clearly Carl Sagan was not from the world of motorsport, however, if this 914 was fixed up properly and restored to stock then I think it would provide a lot of pleasure for the owner and have resale value far above what a 914 normally commands. I don't think you would be able to shaft Elon Musk $2.5 million for it, however he did pay $20 million for a tweet not so long ago. I think that he would make it worth your while to restore it to stock, as if Carl Sagan had just driven it back from the lab.
Most cars from the last century aren't any good when it comes to that key metric of safety. They are all antiques so it doesn't matter that this 914 has less horses in it than today's cheapest family saloons. It was a competitor to the FIAT X1/9, those British MGB efforts and other gutless efforts of the era.
Although period 911s are of value none of them are special. Everyone has seen a 911 already and they all look the same to non-petrol-heads. The 914 is of an entirely different body shape and even people who think they know cars will take a second look at a 914 due to the rarity of them.
Who the heck is Jeff Gordon? People don't say that about Carl Sagan.