I bought one as I love them. I had it for about 2 days. The loom, as has already been stated, is a key driver of the price. It must have been replaced, or stand by for some considerable outlay. There are quite a lot of advanced electronics in the car to go wrong, not least immobilisers (the problem with the car I 'owned') and other electronic bits and bobs, like seats, etc. I imagine replacing the hood is expensive, but would assume it could be a DIY item depending on how much time you have.
Other than that, I think they're pretty bullet proof. I still love them, but hopefully am over my addiction for now.
JH