In preparing your real estate for the market, spend as little money as possible. Buyers will be impressed by a brand new roof, but they aren't likely to give you enough extra money to pay for it. There is a big difference between making minor and inexpensive "polishes" and "touch-ups" to your house, such as putting new knobs on cabinets and a fresh coat of neutral paint in the living room, and doing extensive and costly renovations, like installing a new kitchen.