I understand that you and your friend are upset but from what I can read from the original sale thread at av123 these were not purchased from the company but through a private sale. Even if the private seller was the owner of the company it really has nothing to do with the companies practices (even though they have been in question lately). As already stated waiting 6 months to take action is way too long since you were told shipment in two weeks. I don't think you are going to get anywhere going after the company you need to go after the actually people involved in the sale. Now as you've noticed Mark is not reachable right now, if you read one of the other recent posts in this forum you will see that his health is not doing well right, and no offense but a mans health is more important than some speakers. I would be asking for the "friends" name and information and be trying to get intouch with him since he is the person who actually had/has possession of the speakers.
I have no connection with the company at all and haven't even really looked at their speakers in months but I don't think it is right to slam a company for something that happened in the For Sale section of their forum. That's like saying don't buy anything from Audioholics because something went bad with a deal here on the forums.
Good luck getting everything worked out it would have been easier if you would have taken action sooner.