Known, but not highly valued Continental name equals Brand Value level four (BV4). Looks to be a notch above a colonial/farmer BLNE grade gun, so Original Quality grade is OQ8. Current Condition looks to be between slightly used and significantly used, say CC2 1/2. BV4-OQ8-CC2 1/2 = $592; sharp call at $600. The refinished stock might knock off a few bucks if it does not fit to the rest of the gun. The unusually high condition might add a bit in the right places.