It is very frustrating when vendors try and pull a fast one, especially when its blatant lies. I do wonder about cars that look great from the photos but there are only pics of the outside (and not underneath). Why not the interior as well? I think if i was looking I would want to see pics of the dash, seats, headlining
and the underside as well as good shots of the usual rust areas on the doors, wings etc.
Good luck, though - it is simply a matter of time (and money

) before you get the right one. At least you know what to look for.
If possible, it is better to buy of a proper enthusiast who has lovingly maintained the car, rather then someone who has bought a Minor on a bit of a whim, but who doesn't really understand it and hasn't maintained/serviced it properly.