Up to 500 USD depending on condition, box, accessories, manual, etc..
Please identify the model. Looks like it could be an Auto5 made in 1948.
Blue Book of Gun Values is a good place to start.
it was made in 1967
1938, Belgium
it was made in 1961
It will be marked if it is Belgian made.
Several, the auto5, B2000, B80 and others
100-1000 USD or so
Your serial number X57552 indicates that your Browning auto-5 shotgun in 16ga.was made for Browning in the year 1951.
Your serial number indicates that you have a Browning standard auto-5 shotgun in 16 gauge that was made in the year 1961.
The serial number L52789 indicates that you have a Browning light weight model,auto-5 shotgun which was made in the year 1955.
This is a 16ga 2 3/4 Belgian made auto5 made in 1949. It could be a Sweet 16 which is the lightweight version or a Standard weight gun. See the link below on values. What other information would you like to know?