The best place to sell used shotguns is to put them on consignment with a gun dealer at a gun shop. This eliminates the problem of selling a used gun and getting proper paperwork done by the buyer who would also have to register the gun in Canada.
Newspaper, gun show, gun shop, Shotgun News, etc..
Pawn shop, gun shop, gun show, for sale ad
If it is illegal, you will be prosecuted.
You can buy used gun safes in the US in many different places. Amazon and eBay are popular places that people often buy these type of cases at. Gun stores also sell used gun safes.
In used condition? around 10 dollars.
In most U.S. states, you can sell to any other individual who isn't a felon. You can also sell to a dealer, and you can sell online on a gun aucton site like gunbroker.com
depends on where you are, but you can always take it to a gun dealer and have them sell it for you. Procedure varies from state to state.
A good start would be a gun shop- most sell used and new guns. See the Yellow Pages phone book under Guns.
Sites such as Craigslist, eBay, or local classified is the best place to sell your gun for a low price.
Yes they do sell gun safes along with many other things at Cabala's. There is also a gun library at Cabala's.
You can sell it at a gun show, you can sell it through classified ads (if your state permits it), you can sell it on consignment at a gun shop or sell it to the gun shop, you can sell it online at websites such as Gun Broker/Auction Arms/Guns America/Cheaper Than Dirt Classified ads, or you can post "WTS (Want to Sell)" ads on forums, or you could even sell it at a garage sale if you so wished.