The 32" bbl likely has a full choke. That is not the best idea for steel shot. Allegedly the Belgian A-5's should not be used with steel shot (I don't know about the other non-toxics like bismuth or hevishot). A 32" bbl is best used on geese over decoys. Limited usefulness as a field gun, IMHO.
If you are looking for a waterfowl gun, check with Browning about the suitablility of non-toxic shot and offer him $300-350 Max. The gun looks to be in good condition but not collector grade.
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"Robo is right" Fuzzball