One or two people on R-R have said he's asking too much. I reckon it's right, not often you find these with low mileage as they're great cruisers even if the 2.4 was getting a bit long-in-the-tooth by this time. If anything, hopefully the high price will keep it out of the hands of wannabe drifters. These are great for someone as a 'modern' classic, in that they've got fairly low-tech engineering but lots of toys for pleasant everyday travel.
The problem is that a lot of people want to get stuff for next to nowt and don't look at them in the proper context. I reckon this is a fairly cheap car considering what you're getting for the money, it'll last for years and grow in desirability. Another thing you can't do with cars like this is compare them to modern ones. Sure, you can buy a 10 year old car for this kind of money in very good nick which then makes people say it's expensive for a 20 year old one but the Vectra you get will have twice the mileage and none of the appeal.
A late T series Corona! I doubt whether that has a 3 litre engine, more than like a 2 litre, or 2.6 at best. I have to say I prefer the sedan version though. They actually made Toyotas in Ireland as early as 1972, and for many years they were the number one car importers which might well explain the popularity.