Do your research on the area and have superior knowledge of the marketplace.
Knowledge is power when negotiating. Research is the key here attend auctions, research recent sales, importantly talk to agents and go to open for inspections; become an expert in the area. Use your superior knowledge of the market combined with facts and figures to negotiate back and forth until a mutually acceptable price and terms are agreed upon. Remember this is not a place you are going to live take emotion out of it and walk away if need be.