How much does this cost to the nearest dollar?

Brio Pressurized Water Storage Tank for Reverse Osmosis (RO) Systems (1/2 Gallon)
Advantages of a metal diaphragm type expansion tank Metal shell has greater pressure resistance than plastic. Lower molecular porosity of metal eliminates air pressure loss. Diaphragm-type design assure stable water outflow. Features Stainless steel connection built for Reverse Osmosis water storage tank; pump tank & thermal tank applications. Brass cap with internal O-ring guarantees no air loss from air-vent. Smooth internal air vent cap prevents diaphragm damaged. High-grade butyl diaphragm, post-cure procedure insures a tasteless and odorless water chamber Is Discontinued No, Available October 31, 2017, Manufacturer Brio

Price is $50.00
Price: $49.99