Have an idea of the market value of the house
It will be difficult to get a new home at a fair price if you don’t know its value. Do your homework on similar houses, especially those in the same neighborhood. Have an idea of what they cost before you approach the seller. The knowledge you have will help you during negotiations. Also, after inspecting the property, take notes of the likely renovations you would need to make. The need to make necessary upgrades would mean that the value of the house will drop. Build on that before you make the final offer.