$10.99 – ANENG VC1019 Test Pen Voltage Detector (Banggood, Aliexpress: ANENG VC1019 Red Laser Test Pen Voice Broadcast Voltage Detector 12-1000V Volt Current Non-Contact Pen Electric Teste Meter Tool (the best price with coupon)).
I have just checked coupons. The lowest price I could get is $10.99 for ANENG VC1019 Test Pen Voltage Detector (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood ($10.99)
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now… The question is – is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $8.49)
Link: Banggood product page
Price: $10.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGTOOS729
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
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 ANENG VC1019 Test Pen Voltage Detector. The lowest price was: $7.99.
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)).