$101.99 – – Peaks Power: 1000W/1600W/2200W/3000W, – No load current: <0.9A, - Output voltage waveform: Pure sine wave, - Rated power: 500W/800W/1100W/1500W, - Intelligent Input Voltage LED Display, - Input Vottage: 12V, - Output voltage: 220VAC/ 50Hz+3Hz, - Conversion Efficiency: 90%.
Latest update shows that 3000W Pure Sine Wave Inverter 12V-220V costs $101.99 (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($101.99)
Banggood warehouse is located in China. Coupons for 3000W Pure Sine Wave Inverter 12V-220V? Nope, there’re no coupons in Banggood. Isn’t it too expensive? From what I can see this price is higher than average price ($73.03).
Link: Banggood product page
Price: $101.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG589b2e, BGET12, BGMARCHSALE, BGET10, BGCAPITALOS8, BGCOUPERT8, BGBFDAY8, BG424324, BGe245a9, BGSPRING8OFF, BGHONEYSP, BGESJY8, BG9e214d, BGAMMT03
(probably won’t work, but you can try them out)
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
Price history (for all/most countries) for 3000W Pure Sine Wave Inverter 12V-220V is here. The lowest price was: $49.99.
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)).