This is part of Microsoft's 20% Razer gaming peripherals sales which is available on both Microsoft's site and eBay.
So this mouse was released December 2019 and it looks like the prices have not been coming down sub $200 yet BUT if you have the targeted eligible items eBay coupon code you can take a further $20 off which will make this only $195.20. Don't forget to use shopback/cashrewards if not using your coupon code.
I was going to pull the trigger on this but I think I'll be waiting for another $66 deal from Amazon for the Basilisk X Hyperspeed instead (link to expired deal). I know they're different mice but I think for my grip, I prefer the shape of the Basilisk and for me rechargeable batteries are definitely a plus for the Basilisk X Hyperspeed. But hey, for those of you who prefer the shape of the Viper and is looking for what is the king of wireless gaming mouse now, then the Viper Ultimate is the one for you.
Update: Out of Stock in eBay but still available on Microsoft Website