Amazon has the Apple Watch Series 5 44mm GPS Aluminum Smart Watch with Sport Band, 2019 model (Gold Aluminum Case/Pink Sport Band, MWVE2LL/A) for $300 with free shipping. List price: $429. Features GPS, 30% larger screen, swimproof, ECG app, electrical and optical heart sensors, built-in compass. Always-On Retina display.
Has excellent Amazon Reviews.
eBay has the Timex Tactic Big Combo 53mm Digital Chronograph Watch (TW5M22800, Green) for $19 with free shipping. Features adjustable green 28mm resin strap fits up to 8-inch wrist circumference, 24-Hour Chronograph with 1/100-second resolution, water resistant to 50 m (165 ft).