Latest update shows that Wltoys 144001 144010 124017 124019 124018 Upgraded Metal RC Parts Set costs $39.59 (in Banggood). Just check coupons out (with price alert and history). What is best price?
Latest price update (UTC time):
Wltoys 144001 144010 124017 124019 124018 Upgraded Metal Parts Set RC Car Parts – 07
Banggood ($39.59)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). Good or bad price? The average price for this item is $40.89, so I think it’s a good price!
Link: Banggood product page
Price: $39.59
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG161db7, BGMatt2022, BG8FORMULAMX
(there’s a little possibility that old coupon will work)
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 Wltoys 144001 144010 124017 124019 124018 Upgraded Metal RC Parts Set.
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)).