How much is a bersa 380 mod.85 worth
100-1000 depending on specifics
It is possible.
20 pound
10-100
A fine revolver.
No such caliber in the S&W line.
In what condition?
50-400 usd
a mod 1904 is worth 50 to 100 dollars if its older.
Depends on how old the revolver is.
Depending on condition, about $250-$300.