For all of you evangelism-minded Christians, The Cheap Place has another great piece in the John 3:16 Believe It patch. You can find it in the Christian Patches section along with many more that would be useful in an evangelism ministry.
What makes this one so effective is the fact that John 3:16 is perhaps the most well-known Bible reference in the world. After seeing it on television - at football and baseball games for the better part of last 40 years - anyone who watches sports with any regularity is familiar with at least the reference. The thing is, most people don't know what the Scripture verse says. Being that they are familiar with the reference but unfamiliar with the content gives you an open door to have a conversation you might not otherwise have.
I'm thinking this might be especially effective in sports-related ministries such as church softball league, kid's soccer, inner-city basketball leagues, and mixed volleyball programs. Anywhere you plan to mix sports and Christian evangelism would be a great place to pass out these patches. And they're not too expensive either, so you should be able to work them into your budget.
Without John 3:16 there would be no Christian faith, so if you're a patch reseller, you absolutely need the John 3:16 patch to include in your selection of Christian items. You can buy wholesale patches from The Cheap Place by contacting them and setting up an account.