eBay has the Invicta 8933 Pro Diver Collection Mens Watch for $50 with free shipping. Features stainless steel case and caseback, bracelet, a hidden push-button, water resistance to 200 meters.

$50 Shop Now

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.

$300 Shop Now

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).

$19 Shop Now

Amazon is offering Up to 29% off Amazon Collection Jewelry including earrings, necklaces, bracelets, and more. Shipping is free for Prime members or on $25+.