Package Content: 1x Glasses, 1x Cleaning Cloth, 1x Storage Box, 1x Chinese Manual.
Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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. ($54.89): BGHONEY2110
2. ($54.89): BG10OFFAFF
3. ($59.99): 13f142
apply code in your basket (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/i1u
Old coupons (from the oldest to the newest): 502C6B, HHHHHOT, b884b7, ML15%Pro, vipupgrade8, BGEC20OFF, bgshOOp10, BGHB20, BgoFErTaSchInA10, bGhOnEy10, BGSD56235, BgcLuBofErtA10, BGAFF10OFF, 7d18f7, BGCuponation10
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi FU007 TS Glasses Blue. The lowest price was: $9.99.
Price records source(s): Gearbest, 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)).