It all depends on the person that wants to buy it, the model (there are over half a dozen Beretta Stampede models), the the condition of the barrel and the weapon parts, the accessories that have been added to it and need of funds by the person selling it.
0 To 400.00
100-300 or so
200 or so
200 or so
around $1,500.
25-100
50-500 usd
About $200, depending on exact model.
0-400 USD depending on model, age, condition
100-300 USD or so
$300-400, depending on condition and exact model.
300-700 depending on usual factors.