Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGYHFDJY, BGAutos, BG3967, BG9702CR, bGhOnEy10, BG2dfcd7, BG6296, BGCARELEC, BGCNA15, 7bcdf9, BGAFF10OFF, BGCuponation10, BG10OFFAFF, BGwhielabel, BGHAudio2, BG10OFFAFF1
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for 9702 7 inch 1 Din Android 8.1 Car Radio.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).