Don't waste your money.  I was able to easily implant my own at minimal costs.  WalMart has a do it yourself kit that is only $29.99, including the chip.  I was able to do mine just standing in front of the mirror in about 5 minutes.  It was the second one I did actually.  I implanted the one for my wife first just to make sure I knew what I was doing.  It was kind of a fun evening for us.  We held hands, walked out of the house under the stars and looked up, knowing that we were now safely tracked by satellite.  I know this will be invaluable information that our government will use to enhance our lives.