After all the rumors, eBay is now officially acquiring Skype. Skype offers free voice communication over the internet ("phone calls", but just not on phones). The speculation is that you'll now be able to talk to potential buyers/sellers on eBay, for free, all through your computer. Looks like eBay really had to dig through the sofa cushions for spare change to afford this one -- the word is they'll be paying about $4 billion in cash/stock/benefits.
This could be very useful for car and parts sales through eBay.
Buyers will gain an easy way to talk to sellers quickly and get the information they need to buy, and sellers can more easily build relationships with customers and close sales. As a result, Skype can increase the velocity of trade on eBay, especially in categories that require more involved communications such as used cars, business and industrial equipment, and high-end collectibles.
Full text: http://www.skype.com/company/news/2005/skype_ebay.html