I have checked all old coupons and price is $27.49 for Flexible Desk 22cm 5X LED Magnifying Glass (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
DC Adpater: 5V 2A, LED: 60 SMD LED Lights, Magnifying Glass Multiple: 5X LED Magnifying Glass, Dimming: Smooth Dimming; 3 Color Modes, Lens Diameter: 105mm/4.13”
Latest coupon and price update (UTC):
Banggood ($27.49)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. Is it a reasonable price for this item? From what I can see this price is higher than average price ($19.66).
Link: Banggood product page
Price: $27.49
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGM1TOOLS88, BG0ba985, BG550c75, BG20236Tool, BGTOOS729, BG6a56b5, BG97f2b1, BG0d01e1, BG454fec, BG550471, BG0d155f
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Flexible Desk 22cm 5X LED Magnifying Glass [EU] ($-3)
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 Flexible Desk 22cm 5X LED Magnifying Glass 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)).