Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
1/3/5/6-Piece Transparent Padlock Training Tool Set, for Lockpicking Training and Practice | $9.40 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Package Contents: 1x Skill Training Padlock, 2x Key, 12x Lock Pick, 3x Needle, 1x Leather Case
Price history and price alert
Here is price history (for all/most countries) for Transparent Lockpicking Training Set.
Price records source(s): Gearbest
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)).