Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Frequency: 2.4G, Scale: 1/10, Brand: Wltoys, Main color: black, Max speed: 40km/h, Material: PA Car size: 41*24.7*21cm, Using time: about 10minutes, Battery: 4X AA(not included) Battery: 7.4V 2200mAh battery(included), Charging time: about 5hours, Channel: 4CH, Item No: 10428-B2, Box size: 60*27.5*22.5cm, Motor: 540 brushed motor
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($181.16): BGVehicles10
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGWL016, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGHONEY2110, BGVehicle10, BGddb9dc
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for Wltoys 10428-B2 RC Car RTR? There we go.
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)).