The 41 Mopar 3 window is a favorite body style of mine and I follow these cars quite closely. You can get a very nice one for under 20k although they do not come up for sale too often. The Desoto and Chrysler may bring a bit more. The 8 cylinder Chrysler will bring even more. You will see running driving non show level cars for sale for 4-6k. There is one in Kentucky that has been for sale for a year, original paint, runs, some minor rust and it has been flipped and the new seller wants 6500. The flat 6 is an easy rebuild, and is fairly bullet proof, also easily modified for more power. However, a complete restoration of one of these cars will quickly put you upside down. If it has sentimental value then you can factor that in