Amazon offers its Prime members the Casio Men's Stainless Steel Digital Watch in Silver/Black, model no. A158W-1, for $10.40 with free shipping. (Target charges the same. Non-members can spend $35 or more to qualify for free shipping; otherwise, it costs an extra $4.48.) That's the lowest total price we could find by $5. It features quartz movement, a stainless steel case and band, calendar display, and water resistance to 100 feet. Deal ends today.

It's guaranteed to arrive by Christmas using Prime shipping.