I agree with the $450+ price range. However, I'm not sure how the shutdowns are affecting prices right now.
More photos and info might change that, but only marginally.
Is it all matching? (Stock, bolt, carrier, mag, trigger, cover and gas tube?)
Is the bore chrome lined ?
Do you know if the bolt and carrier are the early design with a spring loaded firing pin.
Overall, looks like a solid gun, nice catch too.