$54.99 – Moeshouse CM-LS DIY Smart Motorized Chain Roller (Banggood, Aliexpress: 2x Screw, 1x Adapter, 1x Solar Panel, 3x Gear, 1x MoesHouse Smart Blinds Drive Motor, 1x VHB (the best price with coupon)).
According to my DB the lowest price is $54.99 for Moeshouse CM-LS DIY Smart Motorized Chain Roller (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon and price update (UTC):
Banggood ($54.99)
Banggood warehouse is located in China. I have no active coupons for you right now. Low/high price? From what I can see this price is higher than average price ($52.87).
Link: Banggood product page
Price: $54.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGc963de, BGJUNEGSG9, TTBLACK5
(there’s a little possibility that old coupon will work)
Aliexpress
There’re some similar (or not) items on Aliexpress
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 Moeshouse CM-LS DIY Smart Motorized Chain Roller. The lowest price was: $48.75.
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)).