Walmart offers the Casio Men's World Time Sport Watch in Black, model no. AE-1000W-1AVDF, for $15.82. Choose Site-to-Store pickup to dodge the $4.97 shipping charge. (Amazon charges the same price via Prime.) That's the lowest price we could find by $15. It features a stainless steel case, resin strap, quartz movement, date display, world timer, and water resistance to 330 feet.