You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
, Standby power consumption <0.5W, Product size 200x200x148mm, Product model M135FCN-Pro, The projection ratio 01: 01: 01, Lens focuses Non-inductive focus + camera focus, The processor Amilgic T972, Display technology 0.47’’DMD, The input voltage 100-240V~2.5A 50/60Hz, The operating system FengOS, The light source technology 4 channel led, Built-in storage 32GB eMMC high-speed flash memory, Built-in storage 2GB DDR3, Trapezoidal correction Four-point trapezoidal correction, The product gross weight 4.7KG, Standard resolution 1920x1080, Power consumption <220W, Product net weight 3.5KG, Packing size 274x274x256mm
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($841.49): BGPROBuscape
2. ($890.99): BGAProjector
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): bGhOnEy10, BGdragonBoat, BGFMVGUEP, BGAFF7OFF, bgshOOp10, 7bcdf9, BGEOP11, BGFVPZ712, BGProjectors, BGFGPE, BGac598b, BGFPGE
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Fengmi Vogue Pro M135FCN-Pro Projector [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Fengmi Vogue Pro M135FCN-Pro Projector? There we go.
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)).