Yes, the Calypso Green is a rare Fleetwood color, and it looks terrific on that car with the light neutral. As for the top, some like it with and others without, but it's all personal preference and really makes no difference.
Key items for that car would just be, as mentioned, how rusty or not it is underneath, and also just being sure that it runs and shifts properly, and the suspension is fine. Either way, it's an older car, and may need a few minor items, but nothing is too hard or pricey thanks to the simplicity of the car.
For that price, it looks like a TERRIFIC deal, all facts considered. I'd jump on it, as long as it checks out even decently.