Aliexpress
Click here… to search for XTOOL EZ400pro Car OBD2 Diagnostic Tool on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
Coupon (761.37 USD): BGRepair63
(CouponsFromChina.com tip: apply it 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): BGH8361401, BGAFF10OFF, BGSABAUM26, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGHRepair2, BG10OFFAFF1, BGLIG12
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for XTOOL EZ400pro Car OBD2 Diagnostic Tool.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).