Things You'll Need
Instructions
Read Wizard Magazine, which lists the top-100 selling comic books every month. The top sellers are indicators of which characters are hot at the moment and which creative teams are popular.
Buy first issues when possible.
Buy variant covers. Sometimes, to promote or hype sales, comic book publishers will publish a variety of covers for the same issue.
Know your creative teams. Good writers and artists are popular no matter what title they work on and bring value to the book.
Look for new and different material. Most non-superhero books don't do that well, but the interesting ones shine through and gain in value.
Get to know your retailer. The comic shop makes its livelihood predicting the market.