2009 BASE F430 Coupe MSRP: $186,925, 2009 BASE F430 Spider MSRP: $217,310. (New Cars, Used Cars, Car Reviews | Cars.com).
Saying goes "top goes down, price goes up" as a rule of thumb but not always. I personally prefer fixed too and no sunroof. Proper chassis. Much stiffer whereas soft top cars are heavier and have less chassis torsional rigidity.