I started a thread in the exchange to sell and buy items. How do I put the little icons for items I'm selling/want?

They're just an image file. You can save them and then upload them to something like photobucket then load them onto your thread from there. :)

You don't need to save them. You can just right click ,copy image location, and paste that into the [img][/img] tags :)

Thanks jelly :) will do.