According to my DB the lowest price is $8.99 for 6Pcs HSS 1/4inch Hex Shank Countersink Chamfer Drill Bit (in Banggood). Get coupons, create price alert or check price history out! What is the best price?
6Pcs HSS 1/4″ Hex Shank Chamfer Countersink Chamfer Drill Bit 90 Degree Wood Chamfering Cutter 6mm-19mm Metal Drills
Latest price update (UTC time):
Banggood ($8.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. But wait a sec… Is it a good price? The average price for this item is $9.25, so I think it’s a good price!
Link: Banggood product page
Price: $8.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG589b2e, BG20236Tool
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 6Pcs HSS 1/4inch Hex Shank Countersink Chamfer Drill Bit.
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)).