Without knowing which model Beretta you refer to, nothing.
Serial number and features.
Without a detailed description of the handgun, nothing.
Three questions for you: Are there any letters before or after the serial number? Are the any marking on the right side of the trigger guard? What type of gun is it? 92?
A good handgun.
With what you have provided, only that it is a 9mm
50-200 USD or so depending on specifics
You will have to contact Beretta
Just the serial number is not enough to tell who or what you have.
No way to tell from a serial number only.
No way to tell just by the serial number.
model number is always smaller than serial
Usually by the serial number. If no serial number, then by features