Newegg has the Logitech G500 Gaming Laser Wired Mouse for $28 + Free Shipping after code "EMCYTZT65" and a $20 mail-in rebate. Selling for $50 elsewhere.
Amazon has the Duracell Coppertop Batteries (20 Count) in AAA size for $6.78 or AA size for $6.90 after using $0.75 Coupon and Subscribe/Save Option (15% off + free shipping). Cancel the subscription after it ships out.