Watchtronics via Amazon offers Prime members the Casio Women's Sports Diver's Watch, model no. LRW200H-7BVCF, for $15.79 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $4.48.) That's $8 under what you could expect to pay at a local store. It features a resin case and band, Japanese quartz movement, and water resistance to 330 feet.