You know how powerful email marketing is, so I have to ask: Is your job more important to you than IM?
Mailing your list doesn't take long...just a few minutes. Do you really not have enough time to do that? I am just completely baffled by why you would want to sell your list when you could keep it and make money from it.
So you work FT now...8 hours a day I'm assuming? I could be wrong, but doesn't that still leave you with time to study IM? Even an hour a day of studying or doing IM is better than nothing.