There are indeed markets such as Mt Gox where you can set up an account and buy and/or sell bitcoins yes. Getting your $$$$ off their site has in recent times become much more difficult though and doing it without verifying your identity has been neigh on impossible due the financial regulatory restrictions that are now being imposed and enforced. I suppose it is important to remember that there is nothing illegal about bitcoin but you may need to be able to withstand scrutiny re how/why you have bitcoins which is why most people buy and sell they as anonymously as possible. A lot of people use services such as localbitcoins to buy and sell, why not check them out and do some research. Hope that helps.