TigerDirect offers the factory-refurbished Asus VivoTab Keyboard Docking Station, model no. TF600T-DOCK-GR, for $62.96. Coupon code "PLF154300" cuts it to $22.96. With around $4 for shipping, that's the lowest total price we could find for a new model by $38. It works with TF600 10.1" tablets and features USB, SD card slot, and purports to extend battery life by 70%. A 3-month Asus warranty applies. Coupon expires March 30.