There are no used beater EVs in Poland
https://en.guazi.com/blog/insight/used-electric-cars-poland.html
Asstitties is completely correct about their analysis of the Polish used car market. They are nowhere near the tipping point of when it will make financial sense to purchase one.
I'm in Canada and the cheapest EV is less than 50k new, the cheapest new ice is 25-30k. It's definitely worth it, I'm in Toronto and level 2-3 chargers are plentiful, there will be less/different per km costs.