You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Accuracy ±1%(1~200℃) / ±2%(1~300℃), Temp Range 1~250℃/33~482℉ (Continuously Monitoring), Weight 300g, Display LCD&APP (Easy BBQ), Color Orange, Power By 2x AAA Batteries (Not includeds)
Aliexpress
I could not find it on Aliexpress. 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.
Link: Banggood product page
1. ($19.87): BG5519a5
2. ($22.24): BG00c906
3. ($22.24): ADMITADBLACK
4. ($22.24): BG8OFFCOUPON
5. ($22.24): TTBLACK5
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMKCT15, 0e7f33, BGHOMEG12, FBCOUPON1, BGTT10, bGhOnEy10, BGKDUY, BGdragonBoat, BGSS10%SW, bgshOOp10, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, 13f142, BG10OFFAFF, BGwhielabel, BGZXJU520, BG10OFFAFF1, BANGGOODSD, 00c906, BGAlerabat1, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BGcoupon8off, BGGutscheine
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Loskii KC-520 Bluetooth Barbecue Thermometer.
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)).