August marks the released of several anticipated sets. You can purchase them from Amazon or the online LEGO Shop. The 3 biggest sets are the Back to the Future Time Machine (21103), Architecture Studio (21050) and the 4×4 Crawler Exclusive Edition (41999).
4×4 Crawler Exclusive Edition (41999) – $199.99 (LEGO Shop)
There are also 2 promotions in August. You should be able to stack both of these offers if you buy a $50 LEGO Friends set such as the Dolphin Cruiser.