Paying for a new roof

[Tanner Grindel]

I am looking at a house that the roof needs to be replaced. The home owner is willing to repair the roof at their expense. I am considering making an offer assuming the roof issues and fixing them myself and just offering a lower price. Would it be better to have the home owner repair it so if there are any other issues the owner has to deal with them or to try to use the roof as a negotiation point?