My kids love to stop in on the east side to K & L Cards. My son can spend hours searching through the stacks of cards.
They sell the cards single or they can sell packs or boxes. You get cool stuff in the hobby boxes. Like rare cards, including bat, uniform, floor and other memorabilia cards.
You never know what you're going to get.
Layaway available as well as gift certificates.
They also buy & Trade.