As far as we're concerned, the cordless version of Logitech's G502 Lightspeed is the best wireless gaming mouse around. It just isn't the most affordable. Fortunately, it goes on sale every so often, including right now—Amazon is selling the G502 Lightspeed Wireless for $103.99.
That's down $46 from its $149.99 list price. It usually sells for a bit less than MSRP, but this is close to the cheapest it has ever been (it briefly sold for $94.99 in December 2020). Still not budget territory...