Amazon offers Prime members the Casio Women's Classic Round Analog Watch in Black, model no. LQ139A-1E, for $8.89 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $4.48.) That's the lowest price we could find by a buck. It features a resin case and band, quartz movement, and is water resistant up to 30 feet.