Amazon has the Logitech MX 518 for only $27.84 shipped after rebate, originally priced at $49.99. It features “on-the-fly sensitivity adjustment that lets you switch effortlessly from pixel-precise targeting to fast-twitch acceleration, without any software.” Product page — note Amazon may change the price and/or rebate terms at any time.

The Logitech MX 518 Gaming-Grade Optical Mouse does exactly that with its ultra-high resolution, 1600-dpi MX Optical Engine that delivers lightning-fast response and mirror-smooth tracking.

[via Amazon]