I browse for great deals in Apple.com's refurbished section regularly, and this is the first time I've seen refurbished iPod Nano's. The 2 gigabyte Nano is available in white or black for $169 (down from $199).
I've had nothing but good experiences with Apple's refurbished products. If you've been waiting to buy a Nano, maybe now is the time.
Visit the refurbished section of the online store here.
Scroll down a little past the Nano's to see refurbished iPod mini's at their lowest price yet. $139.