Beating eBay? No way. Even if you have better script, support, etc you won't beat eBay. You'd need like $ 20K in SEO to beat them.
I don't think we need advertising at all , I mean as a Bitcoiner you will logically search for something that accepts Bitcoin and you will end up finding OpenBazaar .
Still, Bitcoin is preferred to be used either on the deepweb or in forums. You also need some kind of escrow system so that you can gain reputation.
Nonetheless, I might use it if some people register there
