*UPDATE* This is sold out online. But if they have them at your store, you can price match (Bestbuy.com), but they must be the Pink or Blue colors.
Best Buy's website has the Pink & Blue Microsoft Wireless Mobile Mouse 4000 for only $7.99, Regularly $29.99 TODAY ONLY! I personally have the Pink and this is my absolute favorite mouse that I've had! It has the BlueTrack Technology and so it moves around very smoothly. Go HERE to check it out!