$39.99 – JM-8193 3.7V Electric Screwdriver Kit (Banggood, Aliexpress: JM-8193 3.7V 3 Speed Electric Screwdriver Kit Mini Container Multifunctional 500mAh Battery Multi-bit Portable Utility for Easy DIY Tasks (the best price with coupon)).
I have just checked coupons. The lowest price I could get is $39.99 for JM-8193 3.7V Electric Screwdriver Kit (in Banggood). Price history, coupons and price alert are available on this page. Best price?
Latest price update (UTC time):
Banggood ($39.99)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. Is it a reasonable price for this item? It’s a good price, isn’t it? The average is $41.99.
Link: Banggood product page
Price: $39.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG19a9f9
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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 JM-8193 3.7V Electric Screwdriver Kit. The lowest price was: $38.99.
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)).