I would say that the price is very fair. Its had a lot of work and attention put into it. You could go and buy a newer car for that kind of money but it wouldn't be to that spec.
I get a bit peeved sometimes when this conversation comes up. People say about my car and the fact that its a 2.2SRi and its book price is £1200. And!!
You won't EVER get another car like mine. Its unique. Its worth more than £1200 any day of the week. If you want a cheap car, go else where. Enthusiasts are supposed to be understanding of the time and effort that other enthusiasts put into their vehicles. That Astra is a fine example and peole should respect that.