According to a Mashable article, eBay has had a few previous logo iterations you may not be familiar with:
1. The original "AuctionWeb" black bar: http://5.mshcdn.com/wp-content/uploads/2010/08/aw.gif
2. eBay black bar: http://4.mshcdn.com/wp-content/uploads/2010/08/ebay.gif
3. eBay blue: http://5.mshcdn.com/wp-content/uploads/2010/08/Original-eBay...
4. The kooky eBay we've come to know: http://logos.wikia.com/wiki/EBay