The 42mm Midnight Black and Rose Gold version of the watch is now available for $299 (previous price $329.99) and the 46mm Silver version of the watch costs $319.99 (previous price $349.99). (spotted by PhoneArena).
This price reduction only applies to the Bluetooth and Wi-Fi version of the watch, not the T-Mobile LTE version. Which is currently priced at $379.99 or $399.99 for 42mm and 46mm versions respectively. The current offer will be there till October 20 and only available for the US consumers.