When I was updating this page, then coupon price was $31.99 for Xiaomi Mi Smart Laser Distance Meter 50m (in Banggood). Check coupons or create price alert down below. Do you want to know what the best price is?
Measurement accuracy: ± (3mm + 5x 10^(-5) D*), Weight: 60g, Minimum display unit: 0.001m, Product model: MJJGCJYD001QW, Charging parameters: 5V-1A, Size: 80x 35x 21mm, Measuring range: 0.05-50m, Bluetooth transmission distance: up to 8m (barrier-free)
Latest coupon and price update (UTC):
Banggood ($31.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. You probably want to know if this is a good price. Well, this price is higher than average price ($31.16)
Link: Banggood product page
Price: $31.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG20236Tool, BG985a0a, BGTOOS729, BG7d5aea, BG8FORMULAMX
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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
Price history (for all/most countries) for Xiaomi Mi Smart Laser Distance Meter 50m is here.
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)).