I'd snap this at £20 from a reputable seller
I owned a few umidigi phones in the early days back when they had serious hardware and software issues, I hope that this has changed. Software makes a phone and without bug fixes it gets super painful to own a piece of hardware which is crippled by the software
With no software support and non existent quality assurance
What people don't realise is if you read the reviews for the price they match the overrated Xiaomi phones.
16GB ram needed then.