They've (Google) has their payment system up and that will compete with eBay.
From there, it's good to go!
I believe that Google is THE only one that can successfully compete with eBay. And let's face it...everyone Googles. <smile> Sounds naughty!
Anyhoooooooooo, That's my own take on this of course. You'll need a mighty big stick to knock that one off it's big horse.
My Best,
Donna