New Star Wars Set at Shop@Home Sort-of

The new Star wars sets are posted at LEGO shop at home, but the new Echo Base $29.99 Can or $24.99 Us, not much difference price wise on this set and it is on backorder for 30 days, so why the heck did they even post it for sale. Do they thnik it will sell out fast? I know I will get one for the price, that's for sure. The battle of Endor is up and in stock. $129.99 Can, or $99.00 US.