Does anyone sell social network accounts?

Does anyone sell social network accounts?
I am thinking about this

1 emails - with custom id (not smth like oioioiuoiw(at) mmail )
with:
tweeter account
fb account
myspace account

so it's 1 email with accounts on all 3 social netw.
if yes. what would be the price for .. let's say 100 accounts. (all with 1email + 3socialnetwok acc)

hope i am clear enough.

thank you