Seller making repairs

[Evan Hauler]

Hello everyone! 

I am looking at a duplex that is 400k and rents for around 2100 each side.  In a great area, it is newly rehabbed and looks to be done well. However there are very large horizontal foundation cracking on all 4 of the basement block walls. The seller is going to fix this and replace the roof prior to closing. It will be my second property and haven't seen this situation before.

So I suppose my question to you is, how would you approach this? 

Thank you all in advance, 

Evan