426 and 440-6 cranks? Value?

Hi everyone was wondering what the value of a 426 crank is? Someone I know has new ones and original used ones. Was wondering if they had any value? Some he has are boxes and labeled 440-6 for a six pack and some just say 440-6/hemi or just 426. One hemi one says std the other says 010 magnafluxed. Just looking for a rough value. Would be appreciated. Thanks
Author: Luis9995