Direct from the Trek website:

Internet Sales. An important note about our dealers:
Trek Bicycle Corporation does not authorize our retailers to sell new or used Trek product over the Internet or by mail order. Delivery should only be made to you at an authorized Trek retail location. This is for your safety. We want to make sure that your bicycle is properly assembled, properly adjusted, and is the right size for you. We also want to make sure that you receive your owner's manual and consumer literature. Your Dealer will also explain how to properly use your bike and answer any questions or concerns you might have.


Having missed out on the original post before it was edited, I'm not familiar with how the business plan was supposed to work or what the origin of these bikes is. But it sounds to me (from the above statement) that Trek doesn't ship direct to consumers, and if a dealer is reselling their bikes unassembled they're risking their status as an Authorized Dealer.
Or, at the very worst (since I didn't see the original post) someone didn't get their hands on these half price machines in a legitimate manner and is looking to unload them.