Are the items you're wanting to sell looking their best? If they'd benefit from a quick polish or wipe, then do it. Presentation counts for a lot.
If you're listing an item online, including photos with your listing can greatly increase the chances of someone buying it. In fact, many online buyers won't consider buying an item if there isn't a photo included.
When taking the photo, make sure the room is well lit and there's minimal clutter in the shot. Having too much going on around the item can be distracting.
