There just seem to be a few things that don't add up. There looks to be stuff mentioned on the advert that it doesn't have (IE, nav when it's got a non-nav head unit, park assist where it's not fitted).
The leather does look a bit tired and it looks tired on all seats, even at the top of the drivers seat (which seems weird)
General Altimax tyres aren't actually bad tyres, they're just not a massively well known brand. I'd call them mid range tyres rather than premium ones.
Condition is something that only an enthusiast would have the same standards as I guess you have, however (maybe) an enthusiast wouldn't pick up on some stuff that a (for instance) AA/RAC inspection would.
I don't envy you - admittedly I bought mine sight unseen from the UK while I was in Cyprus, but at least mine was new and I could transfer the new car warranty. It would definitely be worth looking into a Europe wide warranty, even if you have to pay for it yourself.