If you want your own website you may as well pay for a domain name, you can get a .co.uk for about �9 with free hosting for a year, ive done this for my website selling vinyl.
I'd go with ebay to start unless you have the knowledge to set up shopping carts etc because you can just post the items in minutes.
there is a company called
http://www.eshopdepot.co.uk/ who will do all the ecomerce side for you for �100, they do all the site for you and handle the � side and you just send them a list of items and pictures