People are unsure/afraid of things they don't know about. Very few people know about Panteras.
They have a bad reputation. Electrical, cooling, RUST....They are looked down upon by most purebread Italian marques. They are ignored by the Detroit iron crown because they're Italian. They are the bastard children of the car world.
It will be tough for our cars to rise in value because you can now buy a low mileage Viper or Z06 for $30k. Our beautiful cats cannot compete with modern technology.
I don't care though. If the value was that of Hemi-Cuda, then I wouldn't have been able to buy one (actually 2).
My 2 cents