Agree with A and C except that the life is 11,000 hours. I needed to replace a wing on mine due spar boom exfoliation corrosion, and could only get a wing that had even less life left than the aircraft. So I sold it - that was a number of years ago. I understand that CAA approved the 18000 hour extension mod but I don't know if anyone in UK has taken it up. Not cheap when I looked into it.
Half-life with a new engine? Say £18k in good times, but of course like your house it's only worth what someone might pay for it.
I still fly them regularly, including my old machine, but as an instructor now. I know instructors don't necessarily like them but they're honest little aeroplanes. Having said that I'd steer well clear for the reasons A and C mentioned.