You are able to organize the selling of your own property without the services of an estate agent. There are a number of websites that help you market your own property. Once you have an offer it is likely you will still need a solicitor to process the sale and ensure it is legal.
Advertising on the internet
Some sites, such as ZOOPLA, advertise homes that are being sold through estate agents. However there are websites out there that will allow you to list and sell your home without the use of an agent.