Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I don’t want to misguide you about the price. I don’t know if it’s good, because I don’t have enough records in my database… There is one coupon right now! Check this out.
Link: Banggood product page
Coupon (215.99 USD): BGProj
(CouponsFromChina.com tip: you should apply the coupon 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): BG18abd5, BGAProjector, BGAudioVideo
(probably won’t work, but you can try them out)
Price history and price alert
Price history is not available for this item (not enough database records)! The lowest price was 195.99 USD though.
You can set price alert (for Banggood).