"This was a wedding gift to my parents when they got married in 1940 in Chicago," explained Stuart, an attendee at ROADSHOW's June 2012 event in Myrtle Beach. He'd inherited the painting about 30 years ago, but had never had it appraised.

One day, a guest in Stuart's house saw the painting at the top of his stairs and did a double take, "Do you know what that is?"

Stuart responded, "Yeah, it's a painting of an adobe or something."

His guest replied, "That's a J.H. Sharp picture. You don't put that up here in front like that, exposed to light. You've got to protect that."

And Stuart finally followed up on having the painting appraised, talking to Debra Force in Myrtle Beach. To Stuart's surprise, Force appraised the painting at $400,000.