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 you're going to be dumb you'd better be tough. Stupid hurts.