Let us assume it is a Specialty Grade in 80% condition, 12 gauge. Blue Book of Gun Values 34th Edition lists it as $2950. Add $500 with ejectors, and with a Hunter One Trigger add $1500 for both. Price now is $4450. Don't forget this is in 80% ORIGINAL CONDITION.
Yours if with the above extras and with the refinished wood and checkering, plus cut barrels, my guess $1800.