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Amazon [amazon.com] has Kensington Wired SlimBlade Trackball Mouse (K72327U, Black) for $ 60.7 – 15% when you ‘clip’ the coupon on product page = $ 51.59. Shipping is free.

Price:
$ 43.41 lower (46% savings) than the list price of $ 95
$ 8.68 lower (14% savings) than the previous price of $ 60.27