Let's take a look at some ways you can determine your baseball card values.
Local Baseball Card Store
If you have a local baseball card shop that you deal with and TRUST this is a valid option for you. Simply bring your cards to the baseball card store and see what they tell you. I would be cautious when doing this because remember that they may not have your best interests in mind and my try to give you a low-ball price.
Amazon.com
This is a great resource for looking at the selling prices of baseball cards and sets. Remember that when you look at Topps Baseball Card Values online you are looking at the selling price which may be lower than the actual baseball card value.
Beckett Price Guide
The Beckettt price guide is the most trusted price guide in the world of baseball cards. They have been around forever and really know baseball card values. There are two inexpensive ways to check your Topps Baseball Card Values and that is by buying the Annual Beckett Price Guide.
For your convenience I have listed quick links to the lowest priced Beckett Price Guides on Amazon, and there is a FREE SHIPPING promotion going on now so there is no better time to get that price guide and research your Topps Baseball Card values