Some very cool stuff. You are asking a very loaded question. Without knowing you, your tastes, and preferences, it is hard. Sticking with just the Buicks, there is a wide choice of '39s. Personally, if I was after one of them, I'd chase the coupe. It is seen considerably less than the four door sedans. I'm a bit partial to the '41s too - I like the 2 tone green colour combination, although it is missing a piece from the front bright work (I have a spare that would probably work). Of course, the 2 door sedanette is even sexier. I would also personally be tempted by some of the trucks - military or possibly the Diamond T tow truck. With a brief description and a few photos though, it is hard to determine which cars might actually be better...my comments are based primarily on body style rather than an attempt to determine condition...pretty pictures are easier on the eyes than text....