Accuracy Plus in Peterborough has a 28" Belgian Browning Skeet model circa 1970 in excellent condition listed for $2995. Target models usually go for a higher price compared to a field gun. The pictures of yours suggest it is in VG+ condition (blueing wear on the bottom of the receiver) so assuming original condition I'd say $2,000-$2,500 would be a reasonable price for this gun in the Canadian market. Maybe a little more with 28" barrels, less with 26".