Sensitivity: -90dBm, Screen size: 7”, Screen type: TFT LCD Screen/long life, LED backlight, Resolution: 800*480, Brightness: 600cd/m2, View Angle: 140/120degree (Horizontal/Vertical), Size: 180mmx 120mmx 50mm(Note: Sunshield height: 28mm).
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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 and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($82.75): BGEachine10
2. ($84.58): Parts8
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/i1u
Old coupons (from the oldest to the newest): aff7off, rchobbies8, e2bcea, 502C6B, f62884, 2019SPEDM, BG10EA, BGlc58, bgssaff9, BGeachine9%, BGBCFPV, BGEach10, BGBCBG10, BGEachine, BGOTC21, BGCITYADS2019, Email5, BGEachineFB, BGMPB2020, bGhOnEy10, Eachine11, bgshOOp10, BGRC902, BGTT10, BG11EACHINE, BGEachine2021, BGCuponation10
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Eachine LCD5802S 5802 FPV Monitor. The lowest price was: $65.9.
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)).