Here is a link to my prototype: http://www.thesaverssecret.com/
One think I forgot to mention is that this website has very good rankings in google for the following terms:
online yard sale - #1 online garage sale - #3 online sale - #4
Best way I've found when working with designers, is to sketch exactly what you think it should look like. Include colors or themes (from pictures if you can) and then draw some sort of 'mascot', like a cuddly animal, or a lightbulb. This gives the designer most bits of the puzzle, which in turn allows them to (more easily) design you a unique website.