Just check coupons out (with price alert and history). You probably want to know what is the best price?
360° TPU protection and Antenna mounts, Variable GoPro TPU mount (supports ND-Filter inserts), , GPS pre-installed for more safety at distance, 6mm arm design for more durability, XING 2208 motors for more power
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($427.16): BGGAL8
2. ($436.44): Drones6
3. ($436.44): CouponsDE
4. ($436.44): 00c906
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGIFXL5, bGhOnEy10, BGdragonBoat, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGCLUBOFERTA10, BGAFF10OFF, BG10RACING, 7bcdf9, BGMATT7, BGDAVIS, BANGGOODSD, BGRACING1125
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for iFlight TITAN XL5 250mm 4S Drone? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).