I've just finished a complete restoration of one of these (#1824)
http://hmvf.co.uk/forumvb/showthread...tin-Champ-1824
.. and I emphasise Richard's point about complexity. Not only are they complex, but they are not simple to maintain, which compounds the problem.
The rear diff is the usual talking point, but I suspect this fault was the result of driver error/stupidity (call it what you will), combined with a post Service lack of lubricant. I found one rear diff which had the pinion teeth worn to fine points and a sludge mixture coating the interior of the carrier, which apart from the sludge, was an oil free zone.
It is a fine vehicle if looked after but it takes more looking after than a normal military vehicle should.
David - the one you've shown us looks to be remarkably complete, but I echo the others who have commented that the price is far too high.
Jack