Look at Browning Superposeds, which are surprisingly affordable given the amount of handwork that went into them. 12s are plentiful in the $1200-1500 range. 20s run from $1800-2500 depending on configuration and barrel length. Both ranges are for Grade 1s. The Pigeon grades and upwards bring a lot more. I own three (a 12 gauge LIghtning Trap 32 inch with a Broadway rib, a Grade 1 20 gauge short tang round knob with 28 inch barrels and a 20 gauge Pigeon grade, also with 28 inch barrels) and my youngest brother owns another Grade 1 12 gauge with 26 inch barrels. They have been extremely reliable on the clays range and in the field. Not steel safe, if that's an issue, but no other downsides of which I'm aware, except for the salt wood problem from the 60s, which you should investigate before you buy one.
