I found an original Rembrandt at a garage sale. I know it's an original because it's signed. The owners didn't realize what a treasure they had and I got it for only $10.
I think I should insure it for at least a couple of hundred dollars. It's a rare painting, done on cardboard not canvas. Must have been done when Rembrandt was broke and couldn't afford a canvas.
Can someone give me an idea of what it might be worth?