Have a fellow that has an older (60's--70's) Brno SXS in 16 gauge that I am interested in. It has 27.5" barrels choked modified and improved, double triggers and extractors. It is a small frame, very nice handling gun. I understand that these guns have chopper lump barrels, hidden third fastener and are true sidelocks. The gun in question is in excellent + condition. Anyone have any experience with these guns and what is a reasonable price nowadays for these Brno's?