Update! The price has increased. Amazon now has the Wii Motion Plus Wii remote attachment on sale for just $15.26 $13.54 $19.99, the lowest price we've seen to date. This clips onto the base of your Wii remote and provides an even more accurate reading of the gamer's slightest movements, for more nuanced games like Tiger Woods Golf, Virtua Tennis, Wii Sports Resort, and more. Shipping is free with $25 and there is no sales tax (except KS, KY, ND, NY, WA).