ATM you can buy 13pcs M3-M10 Metric/SAE Screw Thread Tap Drill Bits Set Blue Plated for $11.99 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Metric Standard M3*0.5 /M4*0.7 /M5*0.8 /M6*1 /M8*1.25 /M10*1.5, Material High Speed Steel, Package Size 11.7*10.3*3.3cm/4.61*4.06*1.3in, Hexagonal Shank 6.35mm (1/4 inch), American Standard 1/4-20NC /12-24NC /10-24NC /10-32NC /8-32NC /6-32NC, Name Thread Tap Drill Bits Set, Type “Type A: Steel(silver)
Type B: Titanium Plated
Type C: Blue Plated”
Latest coupon code price check (UTC time):
Banggood ($11.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? Is it a low price? Pretty sweet, this is the lowest price I have ever noted for this product!
Link: Banggood product page
Price: $11.99
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG3bc064, BG13e879, BG43a59a, BGDRB18, BGbf1187, BGGines, BGa217d2, BGb0aa70, BG43f3f7, BGTACC18, BG589b2e, BGHTT15, BG20236Tool
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – 13pcs M3-M10 Metric/SAE Screw Thread Tap Drill Bits Set Titanium Plated ($11.99)
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
Here is price history (for all/most countries) for 13pcs M3-M10 Metric/SAE Screw Thread Tap Drill Bits Set Blue Plated.
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)).