I'm gonna jump in and make a disclaimer that I think is correct:
JoAnn (or anybody SCTA/BNI)
can't sell your pre-entry for you and
can't sell you the pre- that someone else has for sale.
She/they CAN "facilitate" the transaction -- point you towards the dude trying to sell his, so to speak -- and it's up to the two individuals to make any arrangements. They also have to report the "deal" to registration to make sure the paperwork is followed correctly.
I think I've got it right. No doubt I'll be corrected if I ain't. . .