Buy 2 mice individually from the Mothership is cheaper than this 2-pack.
Black (marginally cheaper): https://www.amazon.com/Microsoft-Basic-Optical-Mouse-Business/dp/B004MWVLY6/
White (a bit cheaper): https://www.amazon.com/Microsoft-Basic-Optical-Mouse-Business/dp/B005KSBGLY
The link which you shared does not allow a black/business combo.
(Please note: I don’t work for Woot, I just volunteer to help out here on the forums.)