According to my DB the lowest price is 19.99 USD for BBQ Instant Read (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood (19.99 USD)
Banggood warehouse is located in China. Coupons for KCH-203 BBQ Instant Read Digital Kitchen Meat Thermometer? Nope, there’re no coupons in Banggood. Price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 10.76 USD)
Link: Banggood product page
Price: 19.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGb22746, BG00c906, BGeaf456, BG589b2e, BG7ee486, BG2fdcc5
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
Click here… to search for KCH-203 BBQ Instant Read Digital Kitchen Meat Thermometer on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for KCH-203 BBQ Instant Read Digital Kitchen Meat Thermometer.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).