The cost is about $27.00 and you can purchase @ any MAC counter.
It looks like a compact and you'd use a large fluffy round brush to "dust" on the skin.
One compact lasts me about 8 months.
It doesn't come in every shade so finding the right color match may be challenging but if you do find a match-you're stoked. It's a mineral makeup just like all the others and also has the built in spf of 18 or so.
Makes a great finishing powder too for those on camera! Boys and girls alike!