$14.72 – KEWEISI AC 50~300V 20A/100A Digital Electricity Meter Voltmeter Ammeter With CT Power Current Voltage Temperature Measurement – 20a.
ATM you can buy KEWEISI AC 50-300V 20A/100A Digital Electricity Meter for $14.72 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest price update (UTC time):
Banggood ($14.72)
Banggood warehouse is located in China. Is it a low price? My database says that it’s pretty good price, coz average is $15.44. There is one great coupon!
Link: Banggood product page
Price without coupon: $15.49
1. ($14.72): BGMAI666
paste coupon code in your cart and click Apply 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): BGGines, BGM1TOOLS88, BG20236Tool, BGTOOS729
(I don’t think these’re gonna work, but you can try ’em out anyway)
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.
Price history and price alert
Check out price history chart (for all/most countries) for KEWEISI AC 50-300V 20A/100A Digital Electricity Meter. The lowest price was: $13.04.
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)).