I have checked all old coupons and price is 46.99 USD for Knife Sharpening System Tool Fix-angle with Grind Stones (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood (46.99 USD)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. Is it a low price? Looks like this is great price. I didn’t track lower than that in CouponsFromChina database ever.
Link: Banggood product page
Price: 46.99 USD
46.99 USD – This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGWDT15, BG76cfa1
(you can check these old coupons out, but these probably won’t work)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for Knife Sharpening System Tool Fix-angle with Grind Stones is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).