At the shop I worked at here in Southern California, most of the road driven cars we built were in the $325,000 - $385,000 range. The show cars were in the $650,000 - $800,000 range. The most expensive build during my tenure, after the price of the 2 donor vehicle purchases, was $880,000. A shop around the corner from us built the Cadillac CadMad that won the Ridler Award a few years back. IIRC, the build on that car took about 15 years and was 2.3 million dollars...