Great feedback although I wish the "answer" was more clear. Some good news, some bad news (about this body's capabilities.)
On balance I will now look for one... will have to be eBay as there aren't any likely to show up in rural area's CraigsList! I will also tr to buy from some place that will stand by the description and condition. A challenge.
Thanks, everyone, for adding your experiences with the 1Ds MkIII.