Road Runners without special provenance or numbers matching Hemi motors will not bring any major money.
Edited:
I am apparently blind and did not see the blaring "Daytona" decal. So:
However, the Daytona as pictured here is extremely rare (as is the other "wing" car of the time the SuperBird) and generally starts in the $150,000 range. Any provenance or rare options will bring these cars up to and above 1/2 million.
The standard Charger and/or SuperBee which is the same platform as the wing cars can run up to $100,000 with proper engine and options but standard options and no provenance vehicles are normally no more than other muscle cars.
I am no expert but I follow these things quite a bit and these numbers are right in line with the auction results and published pricings on most registries.