Just came from AAA travel store that had 50% of Eagle Creek packing cubes. Picked up a few in anticipation of future trips.
Seeing that 30% off is the best I've seen anywhere else, you did really well!
I got them in the clearance pile at the Tukwila AAA. The had large, medium and small sizes. Suspect other stores have them too. They are so handy for organizing travel items.
I always use packing cubes whether on domestic or European trips, and find them really helpful. It's always nice to find them on sale.
I love my packing cubes. Such an easy way to get organized. Different people have different ways of doing it; I just put all my undies in one and all my shirts in one, etc. It makes packing so much simpler.
I prefer soft-sided packing devices to the inflexible cubes. Giant Ziplock-style bags, available in the home storage section of stores such as Walmart, save space and reduce (but not eliminate) wrinkles.