Love these kinds of stories.
My favorite story was the woman who brought a small table to Antiques Road Show. She had bought it years before at a yard sale for I think $25. It was just the size she was looking for to go in the house she had just moved into.
The guys on Road Show guys were beside themselves when they saw it. It turns out that it was hand crafted and made before the Revolutionary War.
She eventually sold it at auction for somewhere in excess of $400,000.