MChrono offers the Casio Men's G-Shock Solar Atomic Digital Sports Watch, model no. GW2310-1, for $79.95 with free shipping. That's the lowest total price we could find by $2. Features include a resin case and bracelet, alarm with snooze, world time, 1/100th-second stopwatch, date display, and water resistance to 660 feet.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.