Amazon has the Amazfit Bip S Lite Fitness Smartwatch w/ Heart Rate Monitor (Charcoal Black) for $49 - $10 off coupon clip (extra savings coupon applied at checkout) = $39 with free shipping. Fitness watch with heart rate, sleep monitor, sports watch with 14 sports modes, 5 ATM waterproof, music control, 30 days of battery life.
Has above average Amazon Reviews.
Amazon has the AmazFit T-Rex 48mm Multi-Sport GPS Smartwatch (Khaki, W1919US2N or Camo Green, W1919US4N) for $90 with free shipping. List price: $140. Features comes with a wealth of smart functions, including weather forecast, event reminders, call reminders, app notifications, and more, up to 20 days of battery life. Compatible with Android 5.0+ and iOS 10.0+.
Has good Amazon Reviews.
Amazon has the Casio A168WA-1 Electro Luminescence Men's Vintage Watch (Silver) for $15 with free shipping for Prime members or on $25+. Features mineral crystal, 32mm case and quartz movement.
Has excellent Amazon Reviews.