Aliexpress
Click here… to search for VIVIBRIGHT GP80UP 1/8GB Projector on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (139.07 USD): BGBFAFF2019
Coupon (143.70 USD): aff7off
Coupon (143.70 USD): bgchinafest
(CouponsFromChina.com tip: apply it 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): TECH8%, BG3CSUM, BGaDmITAd
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for VIVIBRIGHT GP80UP 1/8GB Projector.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).