Uninformed sellers!

[Matthew Murphy]

Scenario: Duplex each side is 2bd, 1 bth. Seller is offering to carry contract. Terms, purchase price $85000, Down payment of 20k. 10-15 year contract negotiable. Property needs minor rehab (5k), currently it is vacant. 

1st question:

What is the best approach and plan for engaging with a seller, offering financing, but the home needs work and they are overpriced?

2nd question:

Knowing they are over priced, what is the most strategic way to lower the price and their expected down payment? While not trying to upset them and blow the deal.

I have not contacted them yet so I am unsure how negotiable they are. Older couple (tired landlords) selling other properties as well.

Just trying to develop a game plan and approach for when I make contact with them. Thanks guys!