Strategy for Seller Financing

[Lance Turner]

I'm working on purchasing a unique property that includes a small home on 20+ acres.  The seller owns an arborist business, has been in the home since the late 90s, and owns the house outright.  He wants to move further out, away from the city.  I belive the property will be a challenge to sell because, based on comps, its over priced.  The style is not on the current trends and attractive for a home that's priced 3-4x the average home in the area (nothing high end about it).  How would you approach the seller to plant the idea of seller financing.