They sell water guns at toy stores and department stores. stores that sell them are Toys R Us, Walmart, Sears, The Bay, Target, KMart, Amazon and Child's Play.
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.
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.
No.
gun shop, ebay, gunpartscorp
Gun store.
eBay is the best way to sell
Yes
Internet, gun shop, gun show, bulletin boards, want ads.
Some Walmarts do sell guns, and some do not sell gun and these may never sell them.
No way to answer without knowing what make and model the gun is.