Enlarge (credit: Ars Technica) Today's Dealmaster includes a return of the best price we've tracked for Logitech's MX Master 3, our favorite wireless mouse for everyday use, which is currently down to $80 at Staples when you use the code "79674" at checkout. You can also use this code to take $20 off the Mac version of Logitech's MX Keys, a wireless keyboard we've previously recommended.