I've been an eBay seller for a long time. Years ago, sellers were able to just list items and watch the bidding wars. However, in today's down economy, sellers need to actively promote their listings. One of the easiest ways to do this is bump sites.
Bump sites are quick and easy to use. They definitely yield results, too! I check my eBay Traffic Reports regularly to see where buyers and browsers come from (and you should be doing this, if you are not already). The bump sites yield weekly traffic to my listings.
My three favorite bump sites are:
How bumps work:
You visit one of the sites above. To add your items to the bump site, you will need to copy the auction title, the auction number, and upload a photo of your item. I have found the easiest way to do this is to open multiple tabs in Internet Explorer, so you can move back and forth between the bump site and your auction items. I try to choose bright, colorful items with pictures that fill the whole frame; they show up more on the bump sites.
I hope the bump sites are helpful for you, as they have been for me!