I agree with previous posts about how a little bit goes a long way. I agree that it seems pricey. I felt that when I first started using it, but then I noticed months going by and I still had 75% of the powder left!
You get what you pay for and in this case, the quality and results are TOTALLY worth the price! I actually put a little away each month to save up for my Bare Minerals Haul. (I'm a broke college student). I've found that buying the kits saves more and can give you back stock when you're running low.
The "ready foundation" lasts forever!!!! Honestly almost too long. I don't wear foundation everyday but I have had it for 6 months and It hardly looks used. I'm not using any other foundation either. The powder lasts awhile (defiantly worth the price) but I've found that if you start small and layer you get a better result than if you hurry and pile a bunch on.
These products truly last forever! In fact, I usually keep them until they age to the point that I have to toss them (I toss all of my makeup after a certain amount of time). I use the powder over top of my regular foundation because I need a very full coverage. The powder sets my foundation and helps my makeup to last all day. The brushes are my favorite.
I think it is worth the price. I have acne prone skin and have some scars and it gives me great coverage. I use it every day and it doesn't break me out. It also lasts me a long time. I love my bare minerals!