The piece is worth at least $100,000, but it is a priceless piece of state history, he told the newspaper.Cumming was part of the art movement that had roots in northern Washington's Skagit County and produced artists such as Guy Anderson and Mark Tobey.The mural, painted on canvas measuring 28 feet long and 7 feet tall, ended up with Tony Breckenridge after it was folded into a box and moved amon