How much does this cost to the nearest dollar?

OMAX C-Mount to 30mm Eyetube Adapter for Microscope Camera
Packing List 1 piece of C-mount eyetube adapter for USB camera Material metal Material metal Material metal C-mount threads Nominally 1 inch in diameter, with 32 threads per inch Inner diameter 30.3 mm Compatible with our mm adapter); Need to work with our USB cameras that with 0.5x reduction lens 1-year warranty against manufacturing defects Dimensions 26.38 x 17.72 x 15.75 inches, Weight 1 Pounds, model number Rank Microscope Lens Adapters 50, Is Discontinued No, Available September 26, 2013, Manufacturer OMAX, Country of Origin China, Material Metal, Color Black, Brand OMAX

Price is $20.00
Price: $19.99