Inspection found knob and tube wireing?

[Garrett Hayes]

So I have a 4 unit under contract and had my inspection today and they found knob and tube wireing in the basement that is live. There is 2 prong outlets in every unit 3 stories. I'm not sure what to do about this. I want to get a quote to fix it but I have a feeling the seller won't fix the issue.This is my first deal and can't afford closing and fixing all the wireing plus some other odd and ends. I'm thinking about pulling out but want your guys advise first tho. What shuld I do or what can u think of to fix the issue. Thanks