Nice, I like this car!
Surely that expansion tank isn't standard though?
7 series diesels are rare in the UK aswell. Tends to be about 1 940 diesel appear on the Ebay every month - some of them complete basket cases though.
Had my 760 D24TIC for about 6 months now, didn't realise it was "rare". Don't know if you have the same in the US, but we have a site that shows how many of each car were registered during a year (i.e. how many are on the road).
Apparently my 760 D24 is one of just 60!!
http://howmanyleft.co.uk/?q=volvo+760+diesel