25-200 USD or so
About $200
100-300 US Dollars.
50-125 or so
The asking price online for a used Revelation 16-gauge bolt action R316BKB is $100 to $140. The price partly depends on the condition of the gun and if anything, such as magazines, come with it.
Depending on exactly which model, the MSRP for a S&W model 500, in .500 Magnum is between $1,200 and $1,500.
44
Springfield
100-1000 usd
Kalishnikov
About $75.
mossberg
If your model 330 is a bolt action SHOTGUN, it is a Mossberg 183. These are good, durable, reliable shotguns, but not very high value. Depending on condition, these seem to retail for $65-$95 or so.