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About $45 cheaper than buying brand new if you're willing to take a punt on the cert refurb, which is fulfilled by Corsair and has a 90 day warranty.
Available in Cherry MX Red or Brown at this price.
Features USB pass through and media controls. Full specs can be seen HERE
If RGB is your thang then the K70 Rapidfire with Cherry MX Speed can be had for $107.25. Also a refurb.
And if you need a mouse the CORSAIR M65 Pro RGB cert refurb is also about $45 cheaper than paying for brand new.
I have the mx speed version with red back lighting. Not too bad but it's very sensitive which means I accidentally double press letters sometimes.
I also wish I went for the full RGB version rather than just red.