Bottom to top distance: 35mm, Bottom plate thickness: 3mm, Weight ：150.4g (with TPU parts / and battery anti-slip pads), Main body dimension: 185*133mm, Camera plate thickness: 1.5mm(2.5mm included TPU inserts), Arm thickness: 6mm, Wheelbase: 222mm, Top plate thickness: 2.5mm.
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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. ($259.99): BGf6142c
2. ($418.59): Cuponation9
3. ($418.59): BgGoodie9
4. ($423.19): BGJON8
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG993c26, CouponsdeFPV, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, BG8RCToy, hoNEYbGdeAlS, BGToys1, BGRCT10, BGJUNEGSG9, DealBGimpact, 9OFFSUMMER
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for iFlight TITAN DC5 V1.4 4S Caddx Air Unit Polar Drone. The lowest price was: $259.99.
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)).