Just check coupons out (with price alert and history). Do you want to know what the best price is?
Wheelbase: 286mm, Scale: 1/10, Remote Distance: About 100m, Max Speed: 30km/h, Frequency: 2.4G, Brand: Wltoys, Product Weight: 1916g, Channel: 2CH, Main Color: Blue, Battery: 6X 1.5V AA(not included) Car Battery: 7.4V 2200mAh Lipo battery(included), Packaging Weight: 3792g Car Size: 41*24.7*21cm, Motor: 540 brushed motor, Item No: 10428-B, Charging Time: About 4 hous, Box Size: 60*27.5*22.5cm, Using Time: About 20 minutes, Material: PA and electronic components
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($145.53): BGAFF10OFF
2. ($145.53): bGhOnEy10
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG8wl10428, TTxBG10, 2019SPEDM, BGWL10, AFfbG10, BGW1124D, BGHU291, 502C6B, BGBFAFF2019, BGCITYADS2019, BGMPB2020
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for Wltoys 10428B RC Car RTR is here.
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)).