Historical Sale Prices - Realtors look at what homes that are similar to yours have sold for in the past.
Neighborhood - What your neighborhood is like has a lot to do with how marketable your house is.
The Market - Realtors also look at the current market to see what has sold recently and for what amount.
Size and Appeal - How large or small your house is has an impact. It might cost a buyer a lot to change a large space if they need/want to.
Age and Condition - The age and condition your home is can affect the price as well.
Nearby Features - Where your home is located in your community has an impact on your home's value and price.