$300-500, depending on exact model and condition.
40.00
$450
50-350 USD or so
Bushnell (Banner, Dawn to Dusk) has a 4x12x40 that is a good value. The Best? A matter of opinion I guess. Leopold, Zeiss..
250-500 usd
100-400 or so
There are several different models and magnifications. This is an entry level scope, and is in the $20-$50 range.
100-400 USD or so
5-80 usd
Generally, used optics do not bring much money and are not usually sold separate from a weapon. you might try eBay or the auction sites. I wouldn't give more than 75 USD for one.
model 1500, smith and wesson, 30-06, bushnell scope
ABOUT $1500. depending on exact model, condition, scope, etc,