$8.99 – that is current price with coupon for ANENG B04 Voltage Tester Pen 2pcs (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
ANENG B04 Digital Voltage Tester Pen AC Non-contact Induction Test Pencil Voltmeter Power Detector Meter Electrical Screwdriver Indicator – 3
Latest coupon and price update (UTC):
Banggood ($8.99)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. Good or bad price? Well, this price is higher than average price ($5.97)
Link: Banggood product page
Price: $8.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG20236Tool, BGTOOS729, BGeb7d2b
(there’s a little possibility that old coupon will work)
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
Do you need price history chart (for all/most countries) for ANENG B04 Voltage Tester Pen 2pcs? There we go.
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)).