I'm the person that purchased this for about $1600 or less possible about 4 years ago and confirm it was upgraded to .2mm and had the Meridian upgrade certificate to go with it. There were a number manuals as well as cables. I made an internal change and swapped out the fuse to handle Australian power requirements. The unit was in like new condition with no marks on it.
You can search some of my previous posts where I stumbled on some tweaks not recorded or said possible by Meridian, less said the better

The tweaking got me into trouble and so cooked my somewhat rare tweeters so I got rid of it. I think I mentioned this in my posts as well. I think it was more the, not carefully noting the required steps to take when tweaking that done my tweeters.
The 568.2mm is a fabulous pre-pro and was probably the best my ststem ever sounded. The soundstage was simply amazing. I also sold the 568 to go down the HDMI path but I still think about getting a 568.2mm again and doing a home theatre bypass setup to incorporate both the 568 and my denon.
Just out of curiosity, how much is the 568.2mm fetching nowadays?
Has there been any firmware updates for this unit of recent times?
Cheers