50-75 US Dollars.
About $175.00 for single shot models and about $200.00 for repeater models
10-100 USD or so
Yes
With soap and water.
Try Nurmich Arms
No published sn data.
I suspect this is a foreign firearm imported by that company. Unless it is some special target rifle, a 22 single shot is probably only going to bring $75 to $100 in used condition.
A single round of ammuntion? An M2? A Barrett rifle?
25-165 usd
50-125 USD or so
Not more than 100 if that