How much does this cost to the nearest dollar?

SWONVI Arcade Trackball Lighted Illuminated Round LED Trackball Mouse PS/2 PCB Connector for Arcade (Trackballs)
Specifications Material plastic, meta Mouse size * 10 * * 3.94* Diameter of track ball approx. 4.5 Network interface wire Connection method wire Package Included 1 x LED trackball mouse 4 x Screws Note 1. The product you received can be installed by yourself. 2. Due to manual measurement, please allow 1-3cm error, please make sure you don't mind before ordering. 3. Due to different monitor, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. ★TRACKBALL DESIGN Trackball Mouse with Scroll Ring for comfort and precision ★

Price is $19.00
Price: $18.99