HP.com offers HP Wireless Keyboard and Mouse 300 for $20.99 (reg $29.99) with free shipping. 

Product Description:
This duo puts secure productivity and entertainment right at your fingertips. Convenient features include hot keys, an ultra-precise mouse, and data encryption that protects your information.
Features:

• 2.4GHz wireless connection
• single receiver
• 10 hot keys
• Model: 3ML04AA#ABL