According to my DB the lowest price is 79.79 USD for SG 1204 EV2 (in Banggood). Just check coupons out (with price alert and history). Best price?
Latest coupon and price update (UTC):
Banggood (79.79 USD)
Banggood warehouse is located in China. Is it cheap? Well, this price is higher than average price (79.59 USD) I found coupon for you. Check this out.
Link: Banggood product page
Price without coupon: 83.99 USD
Coupon (79.79 USD): BGRCCar5
(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): BG038652, TTBLACK5, BGToys8, JanBGCoupon8, BGMatt2022, BGToySale, BG5RCCar, BGCAPITALOS8, BGCOUPERT8
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
Click here… to search for SG 1204 EV2 Upgraded 1/12 RC Tank RTR on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for SG 1204 EV2 Upgraded 1/12 RC Tank RTR? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).