If you are talking bargains, forget most anything bought new-it will take a long time to recoup the money Mr. Dealer made on you.
Talking bargains today, Spanish boxlocks from the 1970s. Well used English boxlocks from whenever. There are guys who advertise right here looking for 3-5 large for English boxlocks, those aren't a good deal. It's got to be pretty special to bring more than 2 large in a used English boxlock.
Gunbroker is awash in CSMC RBLs (42 of 'em?) some at serious discounts off new retail.
With appologies to Donald Fagen, we all know the danger of nostalgia...


Best,
Ted