Hello, and good luck with the search!
The points covered above seem to touch base with most issues I'd keep an eye on when buying - the V6 combined with the automatic gearbox is a butter-smooth drivetrain that'll feel lovely combined with the soft 75 suspension.
If you need any bits and pieces we have pretty much everything commonly needed for the 75 / ZT, and thankfully a lot of parts that were a pain to find a few years ago are plentiful again.
Best of luck, and be sure to post some pictures when you've chosen a worthy 75
