Best Buy offers the Logitech G400 Optical Gaming Mouse, model no. 910-002277, for $29.99 with free shipping. (Amazon charges the same; newegg does as well via coupon code "EMCXTWS66".) That's tied with our January mention and the lowest total price we could find by $4. Sales tax is added where applicable. It features eight programmable buttons, in-game adjustable DPI, scroll wheel, and more.