Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
With square wave output function, Test continuity and diode, Measuring capacitance/NCV, Measuring resistance/temperature, Measure AC and DC current, Measuring frequency and duty cycle, Including 16 in 1 combination test accessories and a storage bag, Measure AC voltage and DC voltage, Anti-interference AC voltage detection
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGherra, BG2346, BGG22346, BG22346, BGff9c9c, BGGines
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for ANENG SZ18 Professional True RMS Multimeter.
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)).