A long time ago (35 years) I inherited a Browning "Lightning" superposed trap gun. It's of FN manufacture in Belgium and in what I call excellent condition. At my age (83) it's now too heavy up front for me to keep shooting, tho I've been an avid trap and skeet fan. So I'd like to sell it, but have no idea of the value. Without buying the blue book, can anyone tell me what it's worth?