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Something new and something old, eBay (NASDAQ: EBAY) the large Internet trading platform competes more each day with Craigslist, who's platform continues to unfold. They are very much the same, and oh so different, too. Craigslist has been resisting becoming eBay in too many ways, yet eBay has gone through the back door to acquiring partial ownership and tracking a competitive threat from the inside.

Being public, eBay must disclose its financial information, which is not true for the private Craigslist. Craigslist is not happy about eBay's ownership position, and for its part eBay has sued Craigslist. It says the board diluted its interest in the popular site by more than 10%, and the two have been trading accusations since.

For most of Craigslist's history there has been pressure to become public or sell itself outright or make the pursuit of profit a higher motive. That has been shunned in favor of slowly building a user friendly and practical Internet information trading platform.