I get a lot more views on items initially when I post them on weekend afternoons than any other time. I figure with work and other obligations, most people aren't checking to see recently posted items during the week. I'm just starting out so I've been researching similar concerns to yours, even tags as simple as the color of an item can broaden the range of your scope. Also some people have had problems when pluralizing and item in their tags, the example mentioned stated searching for "ear cuff" will merit more results than "ear cuffs"
Just somethings I've picked up along the way, hope it helps!