Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (100.95 USD): BGPHOOL8
Coupon (106.88 USD): BGGines
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGb48356, BG49023
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Drillpro 388VF Oscillating Multitool with 2 Batteries.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).