READ CAREFULLY, there are 3 purchase options in the drop down menu!!

3 options:

Left (2x or 3x)

Right (9-speed)

Set (both)

You are buying one side, or a matched pair of shifters as shown in the photos.  All different prices.  

The best 3x9-speed shifters shimano produced.  New take-off, as shown.  These were never used outside a showroom.