Edit: I don't buy that a $60 dollar grinder will get you 80% of the way. The output of such cheap grinders that I have seen have very poor consistency. You're looking at low hundreds to get anything decent and even then you will have very clear differences when matched against a top end grinder.
Is a used Baratza Encore much more expensive than that? A new one is US$ 140:
* https://thewirecutter.com/reviews/the-best-coffee-grinder/
Obviously espresso is completely different, and agreed, you'd have to be at the mid-hundreds to get to a barely good-enough starting point.
That said, I prefer to buy grinded coffee. It's not perfect, but miles ahead of instant coffee. That's perfect combination of time/price/taste for me.