Lenovo offers Lenovo 510 Wireless Keyboard & Mouse Combo for $18.99 (reg $49.99) with free shipping.

Product Description:
The Lenovo 510 Wireless Combo Keyboard & Mouse compliments your desk with a simple yet elegant design. Easily connects wirelessly with PCs using a nano-USB receiver. The keyboard features a durable, water-resistant casing equipped to handle the occasional spill. The island keys are designed to increase typing accuracy and comfort. The accompanying wireless mouse has ambidextrous design and features a 1200 dpi optical sensor for accurate pointing. 

• Elegant, wireless design reduces desk clutter
• Spill-resistant keyboard with comfort keys
• Ambidextrous and ergonomic mouse designed for all day use
• 12-month battery life with a single AA battery