I agree with Jim, it's got a lot of mods but probably not a known 'smiths work, too rough and unrefined. Also, the overall condition of the gun is not so good, it looks like it's had a tough life. Not much value there, not even what a used '78 Colt Commander in that shape would bring because of the mods. Might be worth a something to someone as a project gun and, of course, you never know what gunbroker might bring.
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper