eBay with Uetronics has the Certified Refurbished, very good Samsung Galaxy Watch 3 45mm GPS Bluetooth Smart Watch with Advanced Health monitoring, Fitness Tracking and Long-Lasting Battery, 2020 model (Mystic Black) for $50 with free shipping.  

Features Bluetooth, Wi-Fi, NFC, GPS, integrated Bixby voice assistant, 1.4" OLED display. Here's the review from The Verge.