$8.99 – Drillpro 3pcs 4-12/20/32mm HSS Step Cone Drill Bit (Banggood, Aliexpress: Material HSS, Finish Titanium, Length 6.7cm/ 7.4cm/10.2cm (the best price with coupon)).
You can get Drillpro 3pcs 4-12/20/32mm HSS Step Cone Drill Bit for $8.99 using coupon code (in Banggood). You can create price alert here, copy coupons and view price history. What is the best price?
Latest price update (UTC time):
Banggood ($8.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Is it a reasonable price for this item? Actually this is the best price in history according to CouponsFromChina database!
Link: Banggood product page
Price: $8.99
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG6952, BGDRB18, BGUS6952A, BGherra, BGd00e93, BGa6da92, BANGGOODSD, 6GSGIT, 00c906, BGGines, BGTools8
(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
Check out price history chart (for all/most countries) for Drillpro 3pcs 4-12/20/32mm HSS Step Cone Drill Bit. The lowest price was: $8.99.
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)).