How much should changing locks cost?

My house was recently broken into and the person took the keys to my house. I called a locksmith immediately and they changed my locks (4) and handed me a bill for almost $800. Did i just get ripped off??

Answers:
If it's so simple, then tell us how! Who knows what it should cost for decent hardware? Two locks/handles and deadbolts.
ty

Other answers:
It should have at the most been $200.
It should have at the most been $200.
Yes, especially since you could have gone to Wal-Mart and gotten a set of locks with deadbolts for less than $50.00...they're real easy to install.
You can buy a double set of door handles and dead bolts at Menards for under 100.00, all it takes is a phillips screw driver and noone telling you, you can't do it.
it depends on whats involved,and what type of lock,but i'd do it for around 20 bucks depending on how many locks.Changing locks is simple.
$800 did he install Medecos or Fischers? If you have Segal or some other crappy lock, yes, you were ripped off. Did he just change locks/cylinders or did he also install additional deadbolts. Can't say anything without more detail.

Invisiman, what kind of crappy hardware do you have on your house? $50 for a couple of locks? That's what caused her break-in to begin with, cheap hardware.
You say you called the locksmith immediately. Do you mean nights or weekends? That would cost more than having him come during normal business hours. Also, the number and type of locks he used makes a difference. The lock sets you see at a HD or Lowes are not what any locksmith I know would use. That makes sense, because the big stores just want to advertise the lowest prices. Most of their customers are not focused on quality. A locksmith has to charge for his time, so better quality locks are only an incremental difference.
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