As Alan B correctly reminded me he was very helpful when I was looking for my VX. Not only was he able to answer specific technical questions but he also gave me the necessary push to buy one (a decision I do not regret) even though filling the beast up can cause initial concern.
But overall it's the only car I've really been really fond of. I was also very lucky to find the (I believe) the only 175 limited edition VX in the UK (but I wouldn't be surprised if there are others - but not to my knowledge)
I'm in Manchester I visited it in Sussex to look at it after it had recently been privately imported. I subsequently flew down to pick it up (then drove it back) but other UK owners have purchased from Spain and then drove back over 2000 miles.
History is a problem with any private import so it's best to take your time, know the problems, talk to the owners on the forum and take a few for test rides before purchasing.
The one you've mentioned p966, I believe, has been on the market for a long time so perhaps the trader would drop the price by quite a bit.
As you've mention the original double din hifi unit is interesting. On mine it is used as the reserving camera display (I recently had the camera refurbished at Clarion UK), as a radio (but it's limited unless you fit a band expander), and as a cassette player (though with an adapter tape I've connected a ipod). I don't know why people mention that it had a CD player (except the American version it quite different to the JDM VX with only a single DIN unit and no reversing camera). So if the reversing camera fails I can understand owners replacing the original Clarion (ADDZEST) with a European market unit. And a few UK VXs have done just that.