This deal has ended.
Overstock.com has a refurbished 4gb iPod Nano in Pink, Blue or Silver for $152.99 after this 10% off for new customers (there is an 8% off coupon for returnees). Shipping is $2.95 and there is no sales tax (except UT, IN). The Apple Store has these for $149 but sales tax kicks that above $160. New 4gb Nanos are $199.