If you had a private sale would you use an agent in Kansas

[Jason Monroe]

So..... My grandmother has this townhouse property in Lenexa. It's was built in the early 1960s I'm the person on the ground I'm pushing for a private sale one of her neighbors collects units in the community that my grandmother lives in. 

I am trying to push a deal to her as the property is odd and not really appropriate for a traditional retail buyer since it would require significant rehabbing in order to work as a rental or owner occupancy. 

In this scenario where the seller and the buyer have already been identified and the price worked out would you use an attorney or try to get a fixed price from an agent since at that point all the heavy lifting is done?