Gunbroker.com, auctionarms.com. gunsamerica.com, "want to sell" threads on firearms related forums.
Some shops sell them or u can go on th,e Internet and look or go onto the jls website they sell everything there
Smith and Wesson does not build rifles. The rifles they sell are made for them.
Coins can be sold to coin shops or pawn shops, or you can sell them on an internet auction website, but you have to know what you are doing.
Ebay
"Yes, believe it or not Avon does sell collectible Christmas plates, and when they are not in stores seasonally, they can be purchased for the most part on eBay."
Library, internet forums, internet searches
gunbroker.com
Yes
Rifles, shotguns and handguns.
Local stores that sell guns or weapons will have a variety of information for an consumer with questions about sniper rifles. Academy and Wal-Mart are two different providers of guns and weapons who also sell sniper rifles.
There are many different websites that sell American made collectible ornaments. Some of these websites include http://www.wendellaugust.com/products/types/Ornaments and http://www.achristmasornament.com/.
You may be able to purchase rare and collectible vases on eBay, as there are generally people who sell rare and collectible items. You can also try antique stores or pawn shops.