Your price point will determine the neighborhoods in which you will live.
A real estate professional can show you what is available for sale, only you can decide which $40,000 house meets your needs. Unless you have shown unwavering commitment to your real estate professional and have become a member of the 'First Look" buyers, it is very unlikely you will get an early look at a good house that is priced way under the neighborhood values. By the time the public becomes aware of these deals, on aggregate websites, they are already sold.
Most definitely, you will not find such real estate trolling aggregate websites. Call a Boca Raton pro and get the scoop on the probability of success based on your price point and requirements.
Best of Success,
Annette Lawrence, Broker/Associate
Remax Realtec Group