In this configuration, I'd say in the $5-8K range with the usual caveats of chambeing, originality, embellishment, bore condition etc. playing a role in valuation.
They're not exactly common with spans of months to years between good examples coming to market so it's very much a matter of what you or another enthusiast is ready to pay at the time.

I handled this particular rifle.
I'd very much like to have it.