The coupon price for HSS Titanium Coated 1/4 is 6.99 USD (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 (6.99 USD)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). What about the price? According to my database, the average price is 7.48 USD and current price is 6.99 USD, so it’s probably a good price!
Link: Banggood product page
Price: 6.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG589b2e, BGd2f208, BGHTT15, BG20236Tool
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
Click here… to search for Drillpro DB-T2 13pcs 1.5-6.5mm HSS Titanium Coated 1/4 Inch Drill Set on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Drillpro DB-T2 13pcs 1.5-6.5mm HSS Titanium Coated 1/4 Inch Drill Set.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).