Brand iGPSPORT, Screen 1.8 Inch, GPS High Sensitive GPS+QZSS+BEIDOU, Battery Capacity 850Amh, Firmware update BLE, Color Black, Interface Micro USB, Real-time Tracking Yes, Memory Capacity About 200H, Waterproof IPX6, Model Number iGS10S, Wireless Bluetooth 5.0/ANT+, Weight About 58g, Stopwatch and Accessories Wireless Stopwatch, Automatic Backlight Yes.
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($42.29): BG589b2e
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG3c2bf9, BGa2d459, 2203ActiesNL, BGRBIKCN06, BGb91c59, BG237bfb, BG8a88f1, BG1e1f7d, BG1d568e, BGac30a7, BG7d63fd, 9OFFSUMMER, Cuponation9, BG8ReviTrage, BGcoupon8off, BGGutscheine, BG00c906, BG8OFFCOUPON, TTBLACK5, Sports23q1, BG882649
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for iGS10S GPS Bike Bicycle Computer. The lowest price was: $27.29.
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)).