That is not rediculous.sorry.it is standard practice, as sad as that is.
They ALWAYS charge you a FLAT fee, typically ~$200-400 depending on model, THEN when they actually open the camera up, they do a REAL assessment of the work needed, and either revise their invoice, or they will refund the initial payment, and then give you an updated invoice..which is what happened..
This is not really that bad. Every experience I have had with repair centers(always use the Virginia location myself) has been perfectly acceptable.
I am sorry you feel you are getting hosed.
The price of $895 is probably only for one or two parts!!NOT the whole camera. You really need to find out what their most recent assessment says is "wrong" with your cam....
I bet it is the CMOS assy, and possibly the shutter and main PCB, or just the shutter and sensor.
Actually...it could just be the sensor..
More than likely, they will return it saying "Beyond Economical Repair"....
At that point, your options will be few...
Sorry to hear about your experience!!