I recently came across an Ithaca M37, bead sight. No sling, no heat shield, but it had no decorative engraving or anything. It was fully parkerized. Im pretty sure it had either a 20" or 18.5" barrel. It leads to believe it was either a police issue or one of the very few parkerized commercial versions. Anyways, they had it listed for 400. I can probably get it cheaper. I was thinking about picking it up and cloning a Vietnam era correct Ithaca Tench Gun out of it, considering the only thing this would take would be the heat shield + bayonet lug attachment and the addition of a rear sling swivel stud. Any insights on what these are worth and what I've got here?