Flippers are looking for houses that are not worth anywhere near as much in their current condition as they would be with some renovation, and I suspect that your house is not like that. They are usually looking for unoccupied houses in decent neighborhoods that the owners want to get rid of quickly. In our last house in Palm Springs, our nextdoor neighbor had turned his house into a "safe house" for recovering gay alcoholics in an AA program that he ran, and he moved into another house he owned in the neighborhood. When he died, the heirs wanted to get the house cleared out and sold as quickly as possible, so they sold it to a flipper for much less than the Zillow estimate, which is based primarily on what other houses in the neighborhood have sold for, regardless of its condition. The flipper did a major clean-up and cosmetic renovation, and sold it for more than the Zillow estimate.