No way to answer without a detailed description and pictures.
300-450 or so
ya mum
100-700 usd
50-425 USd
Seldom exceed 300 USD
1,800-2,500
12g-9 = 3
100-1000 USD and up depending on specifics
50-500 usd
870 and 700
not much keep coming up with 50 - 200 bucks
It is: 12g+9g = 21g