A variety of merchants via eBay take up to 80% off a selection of men's and women's tactical watches. (It advertises up to 50% off, but we found deeper discounts within.) Plus, all orders bag free shipping. A couple of best bets:

• Victorinox Men's Swiss Army Professional Dive Master Watch for $262.35 (pictured, low by $34)
• Citizen Women's Eco-Drive Provesional Diver Watch for $370.67 (low by $151)