I am monitoring price for 400/600/800/1000/1200 Grit Diamond Sharpening Stone and it is for 7.99 USD now (in Banggood). Price history, coupons and price alert are available on this page. What is best price?
Latest price update (UTC time):
Banggood (7.99 USD)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. Low/high price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 5.24 USD)
Link: Banggood product page
Price: 7.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGWDT15
(probably won’t work, but you can try them out)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for 400/600/800/1000/1200 Grit Diamond Sharpening Stone.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).