Please tell us what the model of gun is
Try www.Gunbroker.com. They are no longer produced.
It can vary quite a bit depending on what grade and the PPGS grading (60% to 100%). All 4 grades were made with no rib, solid rib, and vented rib (each being more valuable repectively). So the range is Grade 1 60% @ $250, to grade 4 vented rib 100% @ $4900. Hope this helps. You need to find your grade & PPGS grading and then check a "Gun Values" book to be accurate.
This is an American Browning A5 made by Remington for Browning. Americans were made from 1040-1949. Yours was made in 1941 auto5man
C.1947. Value in what I consider "good" condition is around $350. email@example.com