Can i find out how much my phonecards are worth?

Question

I have about 80 cards from the late 80's and early 90's from around the world

Answer 1

Have a look on Ebay and see how much they sell for

Answer 2

http://www.atoncer.com/phone-cards/main.... this is another auction site that has phone cards for sale besides ebay/

Answer 3

By now these cards may have actually expired. On the back is a number to call to check the balance. On some cards you would have to actually make a call, and the balance is given to you.