Marketed December 2009
27.9 x 18.6mm CMOS sensor with 16.1 million pixels (1.3x)
Pixel size 5.7 microns
LCD Screen 3 inch 920K dots
10 frames per second 26 shot burst for RAW
Shutter Lag 40-55ms
Firmware version 1.1.3
Diffraction Limited Aperture – DLA f/9.1
Shutter Durability 300,000
Body Dimensions 6.1 x 6.2 x 3.1"(156 x 157 x 80mm)
CIPA Weight 48.5 oz (1374g)
DS126221
#0320300532 OY0103

Bought used on eBay on 11/7/2011 Marshall Eames $4250
I estimate that the shutter had around 30,000 actuations when I received it.
Shutter count was 45,246 on 3/3/2012 using EOSCount on Internet Explorer
Canon EOS-1D Mark IV shutter count is: 143,685 on 5/31/2013.
Canon EOS-1D Mark IV shutter count is: 188,447 on 7/27/2017 at Canon Factory Service Center, Costa Mesa, CA.