You can also buy just the 12 brushes without the roll for $69.
They also have travel kits that are available for less which seem great! The travel kit that includes 7 face and eye brushes for $49. This kit comes in pink (which you can see above) and in black. I really like the pink because it's so cute!
You can view the brushes on their website: http://www.sigmamakeup.com/products/701.html