Do you really know how big eBay is?
Have a look at these figures!

Founded in September of 1995, eBay.com is a global online marketplace where practically anyone can trade
practically anything.
eBay Inc. has a global presence in 39 markets, including the U.S.
Marketplaces has approximately 83.9 million active users worldwide.
Marketplaces net revenues totaled a record $1.48 [...]