While I can enjoy milsurps and guns of general historical significance (this is the kind of rifle used in X), guns of very specific historical significance (this IS Y's own gun) I'd leave to others. I might even quote Indiana Jones- "This belongs in a museum!"
I'd just feel bad leaving them in my safe- not only because it's more vulnerable to loss, but because more people should be able to enjoy them. I just don't think I'd get the value out of owning it.
Besides, a quarter mill' would more than cover the cost of an Audi R8 V10.