$17.99 – USB Cordless Rotary Tool Kit with 256pcs (Banggood, Aliexpress: USB Cordless Rotary Tool Kit Woodworking Engraving Pen DIY For Jewelry Metal Glass Mini Wireless Drill With Accessories – C (the best price with coupon)).
I have checked all old coupons and price is $17.99 for USB Cordless Rotary Tool Kit with 256pcs (in Banggood). Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($17.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. But wait a sec… Is it a good price? My database says that it’s pretty good price, coz average is $19.72.
Link: Banggood product page
Price: $17.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG589b2e, BGPT07, BGPowerTLS2, BGPowerTLS1
(there’s a little possibility that old coupon will work)
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
Do you need price history chart (for all/most countries) for USB Cordless Rotary Tool Kit with 256pcs? There we go. The lowest price was: $16.19.
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)).