It’s at least 50,000. Maybe 60,000 or 70,000. Maybe even more. Off the top of his head, Wayne Cook, pastor of First Baptist Church, Eclectic, and former youth pastor of Northbrook Baptist Church, Cullman, can’t really say how many packs have been sold. But it’s enough for him and his partners to describe BelieverBands on their Web site, believerbands.com, as…