Aliexpress
Click here… to search for iFlight TITAN XL5 250mm 6S Drone on 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 (399.96 USD): Drones6
Coupon (399.96 USD): CouponsDE
Coupon (399.96 USD): 00c906
(CouponsFromChina.com tip: just apply this code 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): BGIFXL5, bGhOnEy10, BGdragonBoat, BGTITANXL5, BGSS10%SW, BGXL5T, bgshOOp10, BGRC902, BgoFErTaSchInA10, BGXL56S, BgcLuBofErtA10, BGAFF10OFF, BG10RACING, BGMATT7, BGDAVIS, BANGGOODSD
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for iFlight TITAN XL5 250mm 6S Drone.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).