Hrmm.. I've had a similiar discussion with a few people and it was decided that the majority of ST165's have been thrashed beyond all recognition.. so the I guess the condition of the car elevates the premium you pay for it (although depreciation would tell you otherwise).
I guess that wouldn't be the ONLY price I'd settle for.. but I'm more trying to establish what people would pay for an excellent example of a car that is a rarity in Australia (or certainly was when it was purchased a few years ago).