Why are Superbirds worth so much?

the birds & Daytonas were fast cars on the street, hard not to be a lil bit fast with the stock motors being Hemi's 440's and 440 six packs!! But in a straight out run, a regular Runner or Charger would eat them up...light to light or in the .25.... they had too much weight!! Those cars did not "Blossom" till around 100 mph like at Daytona...thats when the aerodyno's cleared the path and the horses had the chance to run free.... they were awesome to watch and they put "W's" on the board like the energizer bunny!
Check out the Richard Petty museum and read up on em....they really were an awesome vehicle..... a lil ugly & long for the street, but the street wasn't their dancefloor! They had a much different dance card and on thier floor nothing could touch em!
OK so it was 2.5 cents