Aliexpress
Click here… to search for Decool 3360 Race Truck Building Blocks on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (60.47 USD): BANGGOODSD
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 10decool, TTxBG10, 0e7f33, BGTUIGU, FBCOUPON1, BGCOU04, bGhOnEy10, BGDAC10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGSHIYI16, BGCAR21, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Decool 3360 Race Truck Building Blocks.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).