Random Questions About EBay

I was curious about the growth rate of EBay, so I spent a few minutes on Google. There’s all sorts of financial information, but the kinds of information that would seem of interest to an economist seem absent… questions like:

1. How many auctions are there a month?
2. What’s the growth rate of auctions been like?
3. What percentage of auctions are successful? How has the success rate evolved over time?
4. What is the average size of a winning bid? How has this evolved over time?

I bet a lot of people would be curious. Anyone know where this information can be found, or have an idea what these figures look like?