I often use ebay to purchase items for my company at wholesale prices. I recently found a way to save 5% off everything you buy on Ebay (which you can use as many times as you want). Ebay hired a company called Ebates to stimulate sales by offering a 5% off coupon. The way this works is that Ebates gets a commission when you log onto Ebay through their site. In turn, Ebates gives you part of that commission. You also get $10 just for signing up (which is free and requires no personal info)
Here is a link for the Ebates information page (in case you're interested): ebates.com/info



