I have just checked coupons. The lowest price I could get is $10.99 for 3Pcs Diamond Sharpening Stone Single-Sided 400 1000 1200 Grit (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
3PCS Diamond Sharpening Stone Single-Sided 400 1000 1200 Grit Versatile Use Kitchen Garden Woodworking Tool Sharpener High Durability
Latest price update (UTC time):
Banggood ($10.99)
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now… Isn’t it too expensive? From what I can see this price is higher than average price ($8.33).
Link: Banggood product page
Price: $10.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGWDT15
(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
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
3PCS Diamond Sharpening Stone Single-Sided 400 1000 1200 Grit Versatile Use Kitchen Garden Woodworking Tool Sharpener Durability | $12.27 | – |
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 3Pcs Diamond Sharpening Stone Single-Sided 400 1000 1200 Grit 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)).