Paphiopedilum rothschildianum 
Blooming size plant in 6" pot available for sale at $280.
Only 1 plants available. 
The plant has 4 new growths and 1 flowered growth, with leaf span of around 70 cm. 
The flower images are the previous blooming of the exact plant, with good form and size.

This Paphiopedilum species is also known as the king of Paphiopedilum. The flower petals open sideways, pointing slightly downwards. The petals can be up to 30 cm in length. This species is highly sought after and difficult to come by.