You can snag Cooler Master's MM531 for just $10.44 from Woot (owned by Amazon) today, which is significantly cheaper than Logitech's G203 Lightsync, the best gaming mouse on a tight budget. It's worth taking advantage of this deal even if just to chuck it in a storage bin to have as a backup, in case your main rodent bites the dust.
The MM531 is not very expensive to begin with—it normally goes for $19.99 on Amazon, save for the occasional minor discount. Over on Woot, however, it's nearly half off. And if you are a Prime member, you get free standard shipping to boot. But should you bite? The answer is yes.
This is easily worth ten bucks and change, if you're right-handed (it's ergonomically shaped for right-handed use). The MM531 is driven by Pixart's 3360 optical sensor, the same as found in numerous other gaming mice like the Glorious Model D and O, SteelSeries' Rival 700, and a few other Cooler Master mice, to name a few.
It has a 100-12,000 DPI that you can adjust on the fly with four preset sensitivity settings. You also get seven programmable buttons (and Omron switches on the main clickers), an adjustable lift-off distance of around 2mm, RGB lighting, and 512KB of onboard memory so you can save your settings directly to the mouse (up to five profiles).
That's a lot of mouse for just $10.44.