Originally Posted by JockoHomo

Actually if the problem is internal (and usually clicking is internal mechanics failing) it will have to be repaired in a "clean room" which most repair places do NOT have as they are quite expensive to maintain with the micron level air filtering that needs to be done. It is usually a specialized repair as mentioned above and the cost could run that high.

I recommend using your back ups with a new HD and if the data was not backed up then you will indeed need the services of a data recovery expert. Good luck!