Tires wanted 235/55 R 20 - $50 (san jose downtown)

I have a friend, single mom selling phones and required to drive out of town from time to time.
So I looked at her tires and two barely qualify as spares and two have cord showing.
I'm trying to help the lady.
So no singles, I need at least two as a pair.
Something with safe tread.
The vehicle is a 2009 Nissan Murano.
It runs 20's.
Than you so much.