You can get E500 Fitness Tracker for $65.99 with coupon (from Banggood). Just check coupons out (with price alert and history). What is the best price?
E500 1.83 inch HD Screen ECG Monitor Heart Rate Blood Pressure SpO2 Monitor Fitness Tracker 280mAh Battery BT 5.1 IP68 Waterproof Smart Watch – NO.3
Latest coupon code price check (UTC time):
Banggood ($65.99)
Banggood warehouse is located in China. Coupons for E500 Fitness Tracker? Nope, there’re no coupons in Banggood. Isn’t it too expensive? Well, this price is higher than average price ($33.19)
Link: Banggood product page
Price: $65.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGRCNE500, BG51bfb2, BG284c49, BG147c74, BG4e6cda, BG955b3e
(probably won’t work, but you can try them out)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for E500 Fitness Tracker is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).