Supply and demand on eBay

Every day, thousands of people take the plunge and decide to start an eBay business. Unfortunately, every day, thousands of people also give up on eBay after failing to turn a good profit.

Even if you're a small business or retail veteran already, it can be helpful to review the business basics—in particular, supply and demand—with an eye toward how they work on eBay.

What are the four major eBay goods markets, and how do you conceptualize and time them for auction success? And how does the global marketplace, auction-centric model affect shifts in supply and demand? Read on to find out.