HTC Vive Tracker went on sale in March this year, but they were only available for developers. Starting today, the trackers are available for the general public. They are still priced at $99 and can be pre-ordered as we speak. HTC promises it will start shipping orders next month.
There are also some Vive Tracker accessory bundles. The accessory bundles include a Hyper Blaster gun and tracker with Duck Season for $149.99, and a Racket Sports Set which includes custom molded and weighted rackets and a tracker with Virtual Sports for $149.99.