Just to add my views also (as thats what the thread is about)
Car: I think a lot of time and money has gone into the car and the single setup is great. As mentioned the BN kit is a bit Marmite and as some of the panels are blended and in a non OEM colour, it wouldnt be a straight forward task of sourcing different OEM bits/aftermarket kit to suit the potential buyers tastes (should they not be a fan of the BN kit) and swapping them across.
Price: Again as mentioned is the top end of the market for a Single Turbo Supra, not saying that they don't come around as Im sure they do but you're appealling to a very Niche section of the audience.
Location: I know Ireland isn't a million miles away. But, potential buyers (outside of Ireland) would still have to fly/ferry over to view the car etc then work out means of bringing it back, registering it for UK (or whatever country they live in) roads etc etc.
Not trying to sound negative about the car or anything as its a nice example so please don't interpret it that way GLWTS