Are there any 3rd party retailers that have the new MacBook (specifically 512 GB in space gray) in stock, ready to ship? Call me greedy, but I'd really like to purchase online where I don't have to pay sales tax. But Mac Mall, Amazon (and 3rd party sellers), BH Photo, and Adorama are all still waiting on their initial shipments. The computer was released 10 days ago. Seems strange that stores still don't have it.