DJI Goggles+Vista Transmitter+ Orca Camera.
Just check coupons out (with price alert and history). What is 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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($670.50): BGTT10
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): bGhOnEy10, BGOHOO, BGChollodrones09151, BGChollodronesDJI
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – DJI FPV Goggles with 2x Caddx Vista FPV Transmitter ($-3)
Price history and price alert
Price history (for all/most countries) for DJI FPV Goggles Caddx Vista FPV Transmitter Caddx Orca FPV Camera is here. The lowest price was: $662.14.
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)).