$6.43 – 12PCS Locksmith Hand Tools Supplies Lock Pick Set Practice Handcrafted Tools for Lock Picking Practice – Black.
According to my DB the lowest price is $6.43 for 12Pcs Locksmith Lock Pick Set (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood ($6.43)
Banggood warehouse is located in China. The question is – is it a good price? Well, according to CouponsFromChina database this price is the best in history (2 records). There is one coupon right now! Check this out.
Link: Banggood product page
Price without coupon: $6.99
1. ($6.43): BGPowerTLS1
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGPowerTLS2
(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
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 12Pcs Locksmith Lock Pick Set. The lowest price was: $6.43.
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)).