Things to ask Seller of multifamily

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Hello All, 

I am trying to purchase a 5 unit in PA. I had requested the following information from the seller.

1) Annual property operating data for the last 12 months.

2) Current rent roll

3) Past rent roll for 12 months.

The sellers agent came back and said- nope! 

The seller apparently doesn't have that information and told me to just go through the information provided on MLS. What would you do in such a situation.

Also, I am new to multifamily purchasing.

What documents do you absolutely need from the seller before making an offer on the property?

Thanks!