Yes, I got it from HDew, they are still cheaper than anyone else.
Don't believe people when they say the mkiv is not a significant step up from the mkiii. I can already see that it focuses faster, more accurately, has better DR, less noise at high ISO, gives me 61 point AF at f/8 at the long end of my 100-400 mkii, even with the 1.4x, the touch screen makes operating menu functions quicker and I can easily move around a magnified image on the LCD. You can use the touch screen to focus in live view mode. Canon have also added an new exposure compensation button. The level of customisation possible on the mkiv has been increased, which is its best feature I think.
One of the best custom features - I now have three different, instantly interchangeable shooting modes using the shutter, AF-ON and * buttons, which are set up as follows:
Shutter button: Metering and AF start, one shot
AF-ON: Metering and AF start, AI Servo
* button: Metering and AF start, AI Servo
The key is the ability to programme a detail set for the AF-On and * buttons. This enables you to select a specific AF start position, AI case, and AF area for each of the back button AI Servo modes. At the moment I have chosen to set mine up this way:
AF-ON: AF start - manually select point, AI Servo - case 1, Zone AF
* button: AF start- manually select point, AI Servo - case 2 and TS -2, Auto selection AF
The result is three instantly interchangeable focussing and metering modes. I can use the shutter in one shot mode for still subjects; then instantly switch to one of the back button AI Servo modes for moving subjects. Providing you keep your thumb on the back button of course, pressing the shutter doesn't then override focus.
There's a really useful tutorial on YouTube that explains it in detail:
https://www.youtube.com/watch?v=D_R77Gs8Q6E&t=1sThis is after just 48 hours with the camera ! As I get to know it better I'm sure I will learn more ways to use it to my advantage.