Basically copy coupon, view price history or create e-mail price alert. Best price?
4xCortex-A73, CPU: MediaTek, ROM: 128GB, up to 800MHz, 2.0GHz & 4xCortex-A53, LPDDR4X dual channel, GPU: ARM Mali G72 MP3, RAM: 6GB, Card Extend: Supports MicroSD Card, up to 256GB, UFS 2.1, Helio P60, OS: Android 10.0, up to 2.0GHz
Aliexpress
There’re some similar (or not) items on Aliexpress
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 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: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): Email5, BGBISON, 7d18f7, BGBISONAU, BGUMBI621, ADMITAD2212, MVC8SPRING, 8BGwbg2204, BGAUGUST8, BGCAPITALOS8
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – UMIDIGI BISON 6/128GB P60 [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for UMIDIGI BISON 6/128GB P60.
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)).