$9.99 – 30cm Diamond Knife Sharpener 600 Grit (Banggood, Aliexpress: 30cm/12″ Diamond Knife Sharpener Sharpening Steel 600 Grit Oval Design Efficient and Safe Tool Sharpening (the best price with coupon)).
The coupon price for 30cm Diamond Knife Sharpener 600 Grit is $9.99 (in Banggood). Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
Latest price update (UTC time):
Banggood ($9.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? Is it cheap? According to my database, the average price is $10.74 and current price is $9.99, so it’s probably a good price!
Link: Banggood product page
Price: $9.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGWDT15, BG76cfa1
(these codes were not working in latest coupon update, but you can check them out anyway)
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.
Price history and price alert
Here is price history (for all/most countries) for 30cm Diamond Knife Sharpener 600 Grit. The lowest price was: $5.99.
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)).