You should have sold the miles while keeping bidders'
identity secret. E-bay offers this feature. Only AA has
this problem. It seems their security department has
nothing else to do. I was buyer in one of those
transactions (for over 200k miles)and the seller was
caught. Then, later I bought miles from another seller and
he kept all bidders' e-mail secret. There is no way AA can
find out who was the buyer. The seller will probably get
e-mail from AA warning about the transaction. But you can
ignore them since they do not know you name or AA Advantage
#. Of course, you need to be smart enough to have
different Ebay e-mail address than what you gave to AA.
Wait a few weeks before completing the transaction. Also
use commom awards like 25k, 30k, 40k, 70k, etc. If you
transact 500k or 1M k miles all at once, you may get
noticed quick. Never respond to AA's e-mail, since
computer geeks can trace out which geographical area the
e-mail originated, unless you use a head stripper or
anonymous remailer e-mail program. Of course, if the buyer
is AA decoy, you may have the problem with miles
forfeiture. But they like to nail without spending the
money because it is easy. Make sure you clean out your
balance, so they can not forfeit.

I have a problem with AA's attitude, since these miles are
earned by the traveler, sometimes at the cost of great
discomfort and expenses. The seller must be able to barter
with whatever he can get. But being a small guy, I can not
fight them. Surely, I can outsmart them.

So, guys, Buyers and Sellers--You can sell it, but be smart
and vigilant. Learn from others. I have done it. So can
you. Good luck.