Defiance (movie)

37 rare baseball cards found in Ohio attic to be auctioned at Baltimore convention

It was like something out of a Hollywood movie — a musty attic in a stately old home, a forlorn-looking dollhouse perched against one wall and underneath it, a mysterious dust-covered box wrapped in twine.

But what Karl Kissner and his cousin, Karla Hench, stumbled upon on that gray February day was a real-life bonanza of about 700 baseball cards from the early 1900s with a total estimated value of about $3 million, according to some experts.

"Some people discover art in their attic, others discover natural gas on their property," said Chris Ivy of Heritage Auctions in Dallas, which bills itself as the world's largest collectible auctioneer. "These people...