I need to sell my car so I can have some party money over the summer and for the start of uni but I have no idea how much its worth. I made a half hearted attempt to find a website that will find a price for me but it didn't really work. Please help?

I have a Vauxhall Corsa M reg. Its red and has five doors and a fairly low mileage (apparently). I bought it for £900 about two years ago.

How much is it worth please?