Note that you get it EMPTY (0 charges of 250, and it's refillable). It should go without saying, but some people don't understand it without it being spelled out.
You have to fill it yourself. But, since any small Smith BOD that gives 450 or more points or more gives POF (20 Ex DC small or better, or 20 Normal Gold small or better - plus any Iron LBOD worth 450 or more - like the 20 EX polearms or Ringmail, any Ex 6-part weapons or Chain, and 20N and all EX Platemail), that's the easy part.
It's great for reducing house clutter, selling bulk POF, etc.