I am monitoring price for DSTIKE V4 WiFi Deauther Bad USB Watch ESP8266 Atmega32u4 and it is for $119.59 now (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
DSTIKE V4 WiFi Deauther & Bad USB Watch ESP8266 & Atmega32u4 Programmable Development Board Attack/Control/Test Tool LOT D
Latest coupon code price check (UTC time):
Banggood ($119.59)
Banggood warehouse is located in China. Is it good price? Well, this price is higher than average price ($98.99) Only one coupon available!
Link: Banggood product page
Price without coupon: $119.99
1. ($119.59): BGALL8
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGESJY8
(these codes were not working in latest coupon update, but you can check them out anyway)
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
Price history (for all/most countries) for DSTIKE V4 WiFi Deauther Bad USB Watch ESP8266 Atmega32u4 is here.
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)).