It's worth $500, and I'll kindly take it off your hands! Seriously, any model coupe is considered a preferred body style, and the '38's are exceptional cars. There should be a rubber floor mat in the front rather than carpeting. If it runs well and your evaluation isn't overly rosy, it's worth, at minimum, $10,000, maybe considerably more. The fact that it's a one-family car won't matter to most buyers, and with a car that old, certainly not any guarantee of condition. Let's see some pics!