Potential buyers dreaming about a private-island getaway should check out a listing on Pewaukee Lake in Waukesha County. Wilson’s Island includes a three-acre property, two cottages, a storage shed, a generator shed, three piers and 12-hundred-50 feet of lake frontage. The listing price is 890-thousand dollars. The sale would include everything on the island — down to the lawn equipment and furniture. Local rumors suggest the island was traded by Native Americans in the mid-19th-Century for a jackknife.