There are a variety of different places where one can purchase slabbed coins. Stores that specialize in coin trading are always a good place to find slabbed coins. Alternatively, one can often find them on eBay as well.
If the 1882 has a CC mintmark or the 1909 has an O, get it slabbed. Or if you feel that either will grade above MS-60. Otherwise, they are pretty common coins and probably not worth the extra expense.
One can purchase colonial coins from Early America by visiting websites such as Coin Rarities Online. One can also purchase coins from the United States Mint.
A slabbed coin is a coin that was graded by a grading service. There are many grading services out there. You can use google to find some of them. Having a coin graded can give you the exact value and therefore is easier to determine its value.
One can purchase platinum coins when one goes to the official website of US Mint. One can also go online to websites like Apmex, Amazon, or eBay, etc.
One can purchase Military Coins and Challenge Coins by visiting the Military Coins website. One can also visit the Medals of America website for further information.
The purchase of these coins can be done at almost any local bank or money exchange office. For special edition coins, it might be harder to find. These can best be found with collectors.
You can purchase coins from the US mint. It is safe to purchase coins from them because you know you are getting what you bought because they make the coins. The link below has there website.
One can find coins in MS70 condition from the company Acoin, which cells graded American coins. Another place to purchase such coins is through third-party retailers like Amazon.
There are several websites where an individual can purchase bullion gold coins. Examples would include Gold Line, US Gold Bureau, Golden Eagle Coin, and Monex.
You can purchase buffalo gold coins on and local or online coin collector. Many coin collectors carry these and are willing to sell them at a fair price.
There are many places online that one can buy Australian coins as well as many local stores that one can visit. One of the most popular places that one can buy Australian coins is the Australian website perthmint.
You can purchase certified gold coins online from the SIlverTowne website. You can also purchase certified gold coins online from the JM Bullion website.