Welcome to the obsession of gun collecting! And yes, $500 is a fair price.
A Breda M1 can come in many forms. The Danish government surplussed their Garands from war reserves in the '90s. A few containers came to Canada. The armourers weren't trying to help any collectors years down the line, so most Danish rifles are a real mixture of Danish, US and Italian made parts. They were well used before storage, but most were brought up to a decent standard of rebuild before they were greased.
Barrels - VAR is Danish, SA or WRA is US, the Italian ones escape me
Parts - Breda will be BMB and BMR; Beretta will be PB; US will be everything from SA to WRA to NHC (an obscure place that made sight knobs), and there are many many variations. The date codes suggest these were WWII dated rifles, not Korea or post war.
The rifle will almost certainly have a serial number stamped in the butt. Hopefully it matches the rifle. The Italian stocks are a fish scale like beechwood. The handguards will be walnut. You might find BMR stamped on the left side of the butt near the buttplate. There will be a pencil engraved serial number on the bolt. Don't panic if it doesn't match. The jury is still out if the number is an inventory code or part of another rifle serial number.
Don't get excited if it is not a perfect specimen (Hell my first girlfirend wasn't but I still liked her). Enjoy the ride and have fun (speaking of that girl ....)