Galaxieman - If it is the 336 Cowboy it was made near the end of their prodiction run. It was only made for about 4 years. Locally it would bring $800 - $1,000 if in very good condition, seller had factory box, ect. Most used 38-55s sold lately have been by individuals and usually sell with dies, brass and wrong size lead bullets. Marlin made some "rebarrels" for a short time after production stopped until they ran out of barrels. Serial numbers on those are unknown. A lot of money, but for the results it's a caliber than has a lot of potential. As others have stated, you could make an offer around $800 and see what happens. The worst they could say is "no". The 336 Cowboy stumbled coming out of the gate in that the ammunition components were not available and new factory jacketed ammunition was very scarce. I load for my 1999 made rifle from 1999-2000 using necked up/fire formed 30-30 brass. Too, you had to slug the bore as most lead bullets initially offered were 376/377 when most take 379-380. As a recently made, short time offered rifle, remember "they ain't making them anymore". What is out there is what there is. I consider the 38-55 one of the best all around calibers produced in terms of utility vs loading requirements. Good luck. Shenandoah