The Xiaomi Redmi 5A is a nice option. It's a little over your $70 budget but is still a great option if you don't mind spending a little more.
The Ulefone S7 is a decent option for just over $50, so quite a bit less than your $70 budget.
These are the two I would choose between, so if you're set on $70 or under, the S7, but if you're willing to spend a little more, take a look at the Redmi 5A.