GPU: ARM Mali-G72 Up to 800MHz, OS: Android 10, ROM: 128GB UFS2.1, RAM: 8GB, CPU: Helio P60 octa core 2.0GHz 12nm / 4xCortex-A53 up to 2.0GHz 4xCortex-A73 up to 2.0GHz, Card Extend: Support T-Flash Card up to 256GB.
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 Hong Kong. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 13f142, BGDGS86P, 2022ACTIESNL, Tabby20, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for DOOGEE S86 Pro 8/128GB P60. The lowest price was: $164.99.
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)).