I have checked all old coupons and price is $39.99 for 3 in 1 2.4GHz 4CH Technical RC Robot (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
3 in 1 2.4GHz 4CH Technical RC Car Robot Racing Car Building Blocks Remote Control Truck Bricks Gift Toys for Children
Latest price update (UTC time):
Banggood ($39.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Well, is it a good price anyway? Well, this price is higher than average price ($36.53)
Link: Banggood product page
Price: $39.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
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 3 in 1 2.4GHz 4CH Technical RC Robot.
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)).