There are many predatorial people that pose a reputable locksmith companies on line. These individuals advertise low pricing. When they arrive at your home or business they claim you have security locks that cost more and raise the price originally quoted. You can avoid this by asking for detailed pricing in writing, such as trip charge, hourly rate and re-keying rates. Any reputable company would be happy to provide this information to you. You can also check out the better business bureau and your local business licensing agency.