I think this is cheapest ever for this mouse. Note that this is different from recent deal Razer Viper Ultimate Wireless Gaming Mouse w/ Charging Dock
https://www.ozbargain.com.au/node/626035
This mouse feel and weight very similar to Logitech G502 LIGHTSPEED Wireless, pick this if you like G502 and want optical switch and a dock for charging.
Pick the Viper if you want lighter weight but you lose RGB (Very important) and tilting scroll wheel.
Mod Update: Price is actually $127.36 in cart as it stacks with 20% off over $100 - Credits to doweyy
Holy crap this is cheap. Well worth it at this price. I can't decide which I like better, this or the g502. U really can't go wrong with either.
Edit: wtf, I just checked, I paid 270 I think