Goodbye, Eclectic, Ala. — hello, eBay auction.     The boys of Christian rock band Audio Adrenaline waved goodnight to the more than 2,000 fans at Lake Martin Amphitheater in Elmore County Oct. 23, stepped off the stage and asked, “How’s the bidding going?”     “The neighborhood concert’s at more than $10,000, after only two days.”     “Awesome. And Will’s Mohawk?”…