Karen Mallet stands in front of her $9,000 Alexander Calder print. Mallet bought the print for $12.34 at a Goodwill thrift store in Milwaukee.

MILWAUKEE — “Red Nose” just meant a reindeer named Rudolph to Karen Mallet until she bought a print by that name for $12.34 at a Goodwill store in Milwaukee. It turned out to be a lithograph by American artist Alexander Calder worth $9,000.

Mallet's good fortune is at least the fourth time in six months that valuable art has turned up at Goodwill, where bargain-hunters search for hidden treasure among the coffee cups, jewelry, lamps and other household castoffs.

Last month, a Salvador Dali sketch found at a Goodwill shop in Tacoma, Wash., sold for $21,000. Last summer, a North Carolina woman pocketed more than $27,000 for a painting she bought for $9.99 at Goodwill. And last spring, a dusty jug donated in Buffalo, N.Y., was discovered to be a thousands-of-years-old American Indian artifact — it was returned to its tribe instead of being offered for sale.

When told of the Milwaukee woman's find, a Goodwill spokeswoman said workers at its 2,700 stores try to spot valuables and auction them on the organization's online auction site to net more money for the charitable group. But things slip through the cracks and the workers aren't art experts.

“That's kind of part of shopping at Goodwill — the thrill of the hunt,” said Cheryl Lightholder, communications manager for Goodwill in southeastern Wisconsin. “You never know what you're going to find.”