Shutter count is really not important because it may not be a sign of the mileage of the camera.
A shutter costs like $300 to replace and the 5d has a shutter rated for 100,000 actuations. So, even if it has 99,000 actuations the shutter is kinda like buying a car and having to get the transmission flushed..
The biggest cost is still the price of the car..