Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGc8d875, BGfd3d9f, BGHONEY2110, BG3f4700, 7bcdf9, BGe7a249, BGef3ff4, 00c906, BG00c906, 2022ACTIESNL, BG3719bb, BGLQHC31, BGMFD1, BGLQHC32, BGLQHC33, BG1efeb0, BGJDDJ4, BG4MFD1, BGTDL01, BGPL19MAJA3, hoNEYbGdeAlS, BGc0d656, Cuponation9, BGaa99e3, COUPONSDE1wk, BgGoodie9, BG8ReviTrage, BGcoupon8off, BG2dc80b, BGGutscheine, BG8OFFCOUPON, TTBLACK5
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Mensela IT-PS2 Pro 12V/24V to 220V 60Hz Power Inverter 1500W.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).