At $100k each, it really doesn't seem that bad. Assuming they were stored correctly and still in good shape (which they appear to be), I would think they will bring a lot more than that years from now.
I know it's hard to compare different cars, but can you imagine what a GT500, 70 Chevelle LS6, etc would bring today if you had one in perfect shape with 40miles that had never even been titled?
If I had the money sitting around and the space to keep them properly, knowing that I would never drive them either, it seems like a good investment. I buy cars to drive them though!