Possible duplex needs a roof

[Pete Crutchfield]

I am currently considering putting an offer in on a duplex. It needs a roof. Our insurance rates are very very high in this Parish. Average quotes are 4k-5k a year with a new roof. Provided you can find a broker that is willing to write a policy. I have found one quote in the 2500$ a year range. This is with a newer roof. How do I go about asking for a new roof from the prospective sellers? Is this possible? My insurance company suggested I ask for a sellers concession. A roof? That seems like it won't go very far in the negotiation process. It would be a deal breaker to leave the old roof on.