ATM you can buy 1600X 8LED 2MP USB Zoom Digital Microscope for 16.29 USD (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
Latest coupon code price check (UTC time):
Banggood (16.29 USD)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Well, is it a good price anyway? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 9.25 USD)
Link: Banggood product page
Price: 16.29 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG33083d, BGPLPL888, BG20236Tool, BGTOOS729
(these coupons are old, so probably won’t work)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for 1600X 8LED 2MP USB Zoom Digital Microscope.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).