who made the gun. how do you know it's a black powder gun ????
Follow all local, state and federal laws, place ad in newspaper, put on internet auction, pawn shop, gun shop, gun show.
50-200
I believe this gun is an 1872 issue
No
$75 for the gun, up to $125 with scope, sling, and accessories in excellent condition. Midway USA had these on close out a few years ago for $70. Still, if it's a decent inline in decent shape, it's still worth $75-100, even used.
http://www.state.id.us/laws_rules/firearm.html
Your local police can assist you.
"firework powder" is usually gun powder or blackpowder... So yes both of these options can be used in cannons, but don't mix blackpowder with gun powder since they burn at different rates.
250-300$
50-150 or so
1400.00
100-350 or so