Visual representation of a barter

Be creative. I need a way of simulating a barter which explains to people that my web site, superebarter.com allows people to exchange their junk for someone elses treasure. It has to let people know what my site does immediatly. It can be a slogan, picture of a barter and it should contrast nicely with the color scheme of my site, http://www.superebarter.com. It will replace the weekend sale banner which is currently at the top of the page. If you want a better chance to win design a matching logo with your banner :)

http://www.superebarter.com

My site is designed to allow people to have the things they want but cannot currently afford. I thought of this idea when I wanted to be able to trade an old palm pilot for an iPod but could not find a web site to do it. Please submit an banner to replace the on currently at the top of the page which says weekend sale on http://www.superebarter.com. It should tell users what the site does right away without having to go to the about page.If you want a better chance to win design a matching logo with your banner :)

- I want something creative that will explain to people who go to my site what a barter is. And that it can be done easily on my site. it must fit the dimentions of the banner which are on the top of the page and must go with the site scheme. So the idea is to show. Picture which tells people how to barter. If you want a better chance to win design a matching logo with your banner :)

- I don't want non creative ideas