Seeing the Beretta was not widely used by the Allies in WWII, I would wager that it is now worth about 1300 dollars, strictly due to it's antiquity.
300 or so
If NIB, with box, manual, never fired - it depends. Definitely in the 500-600 range. Maybe more or maybe less.
50-300 uSD
50 dollars
50-400 usd
Depending on the grade, $450-$800. Box and papers add to value.
Impossible to answer without a DETAILED description of ALL markings on both weapons, condition of the "fired" one, finish, grips, boxes, papers, accessories, history and serial numbers.
500 or so
About $300.
Requires professional appraisal.
50-100 or so
Many of them do