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techblue ocean via Amazon has 2.4GHz Wireless Tecknet Silent Optical Mouse w/ 6-Button & 4800 DPI (Grey) on sale for $9.99 – $1.50 when you clip the coupon on the product page – $4.50 when you apply the coupon code MEFORU12 at checkout = $3.99. Shipping is free w/ Prime or on orders $35+.