How to Determine Card Value.
Below is a step by step instructions on how to use eBay, the largest marketplace for Sports Cards, to determine the value of your cards.
Go to ebay.com and type in the specific card you would like to determine the card value of.
Scroll down to "Show Only" (left side) and click "Sold Items"
Now you will see cards that have been sold in different conditions. This is how you will determine the card value.