100-500 USD.
They can vary from 100-1000 or more depending on specifics
50-100 uSd
100-200
100 or so
250 or so
100-1000+ depending on exaclty what you have.
A 7.7 Japanese rifle is worth $4,000 or more. If the original scope is still attached, you can basically name your price.
A used scope is worth, at most, about 30-50 percent of what a new replacement would cost.
50-400 usd
100-400 or so
10-100 usd