Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (29.74 USD): BGCarEle3
Coupon (29.74 USD): BGAUTO22
Coupon (32.89 USD): BG00c906
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BG81a176, 6GSGIT, 00c906, ADMITAD2212, 2022ACTIESNL, BGCarEle1, 8Couponsde, MVC8SPRING, 8BGwbg2204
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for 150W Car Power Inverter DC 12V To AC 220V 110V is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).