$6.55 – Material HSS / High Speed Steel, Surface Treatment Titanium Coated, Brand Drillpro, Shank Size 1/4″ Hex Shank, Product Name Titanium Coated Step Drill Bit.
I have just checked coupons. The lowest price I could get is $6.55 for Drillpro 3Pcs 1/4 Inch Hex Shank HSS Step Drill Bit Set (in Banggood). Check coupons or create price alert down below. What is the best price?
Latest coupon and price update (UTC):
Banggood ($6.55)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Good or bad price? My database says that it’s pretty good price, coz average is $7.34.
Link: Banggood product page
Price: $6.55
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGTACC18, BG53bf17, BG589b2e, BGHTT15, BG2e55ed, BG20236Tool
(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 Drillpro 3Pcs 1/4 Inch Hex Shank HSS Step Drill Bit Set. The lowest price was: $5.94.
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)).