5. Richard Mille RM 56 Felipe Massa Sapphire
With the worth of 1.7 million dollars, Richard Mille RM 56 Felipe Massa Sapphire stands on the fifth spot of this ranking. By its availability, only five pieces of this brand are available in the world. A question is here that why only five pieces of this product are available throughout the planet? The answer is simple as it is prepared with tourbillon process that requires over 1 thousand hours for the installation of its case. While 430 hours to grind it, and 350 hours are required to complete and finish the product. And this is the major factor of its rare availability in the world.