$45.99 – 3000W High Power 12/24V Inverter Compact Metal Shell Inverter with USB Charger High Conversion Efficiency Versatile Usage for Car RV Camping Emergency – 220V 12V 3000W.
I have just checked coupons. The lowest price I could get is $45.99 for 3000W High Power 12/24V Inverter (in Banggood). Just check coupons out (with price alert and history). What is best price?
Latest coupon and price update (UTC):
Banggood ($45.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Is it a low price? This price is higher than average price ($39.49) for this item.
Link: Banggood product page
Price: $45.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGAMMT03
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for 3000W High Power 12/24V Inverter. The lowest price was: $33.99.
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)).