Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (371.99 USD): BG65463e
Coupon (380.45 USD): BG7280ff
Coupon (397.36 USD): BG00c906
(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): BDXD38, BGOD1, AFfbG10, BGtravel305, BGTU923, 502C6B, BGBFAFF2019, 25Xmund, BGCITYADS2019, BGTS204, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGCARTENT4, BGdragonBoat, BGCARTENT9, BGCAMP01, BGTOPSALE3, bgshOOp10, BgoFErTaSchInA10, BGEUOD1, 7bcdf9, BGTY742TRL, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BG46a52d, BG4d9120, BGAlerabatod, 00c906, BGe46870, Tabby20
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Lanmodo Automatic Car Umbrella Tent is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).