Why are Superbirds worth so much?

You want to see Daytona's & SuperBirds? Come to the woodward cruise, you will see more of them in one spot than anywhere else on earth!! Every year Mopar enthusiasts commandere a couple of acres along woodward and fill them up with the hottest, rarest, Mopars ever made! It is like walking thru a time warp fantasy!
I remember when they were being sold brand new for around 5k or in most cases less.... I wish I had bought everyone I ever saw!!! I could easily retire very comfortably!! 10 x 5k = 50k if they sell for 250k now that would be 2.5 million....I wish I had bought every one I ever saw!!! I wish my Uncle kept his 55 300 -c hemi car and willed it to me..... then I would have a badass luxury sport vehicle and 2.5 million to boot!!! Damn I like to day dream!!
IF you ever see one RUSTING in a field please let me know where....