sellers and buyers on eBay/Craigslist

recently i've been spending a little time interviewing sellers and buyers on sites like eBay and Craigslist.  ok, i admit, i've actually been spending a lot of time interviewing them.

here's something very interesting:
the power sellers are often also power buyers

that intuitively makes sense but it is not something i've thought about before.   this is interesting because attracting buyers and sellers in a marketplace is not as big of a chicken-and-egg problem as i had thought.