A calling card can be bought from online websites which sell them. You can buy them, they provide you with a code. The code can then be used to call internationally.
There are many websites that sell international calling cards online. One of the cheapest and most reliable is www.rebtel.com.
International calling cards can be found at most major retailers, such as Target. They are normally found with other calling cards and pre-paid phone cards.
This is a site that has a lot of calling cards with different options. You can even order them online (the first time) after that you can call to refill them.Some options are no connection fees, no expiration date. http://www.ecallchina.com/calling-cards/call/Peru.aspx
There are many websites that offer to sell calling cards. One would be able to find calling cards for sale on websites such as Best Buy, Radio Shack, or Pingo.
Purchasing a phone calling card in the US can be done by visiting Wall-mart or Sams Club. Phone calling cards are always provided by a payphone provider like AT&T. In Europe, a phone calling card can be purchased by Nobelphonecards.
You can go to pennytalk.com for all your calling card needs at a discounted price. You can call up to 200 countries for as low as one cent per minute.
You can buy them online, or buy the 1st legendary collection online or from Argos.
You can buy them on amazon.com
You can buy R4i cards online.
There are lots of different choices to buy greetings cards online such as curiosities.com, fineartamerica.com or even moonpig.com where you can personalize your card.
The best location to buy hallmark cards online is at http://www.hallmark.com/online. They have different kinds of cards you can go through and are organized in a nice fashion. The best part about buying them at this website is that you can personalize the cards. They are extra special.
There are many great locations to buy international calling cards from. I would recommend a specialty store that specializes in foreign good/foods. I would recommend an African or Mexican food store. Some of them can be really small and hard to find but usually have a great selection of calling cards.