I have a recent comp for you to use with the Ins Co. if needed ---
I bought my 95 968 MO30 Manual Coupe (Black/Black, 54k miles) in October 2011 for $22k
Which is still in the shop after being rear ended... 9k worth of damage done by a girl on her phone in daddy's 3 series while I was sitting at a red light...
I immediately got on the phone with her ins company, and explained to the claims agent:
how rare the car is - particularly with # of cars sold in the US, the rarity of the suspension package, and the low mileage;
what I had just recently paid for it;
how much time, work and new parts I had just spent on it.
Luckily, her company accepted full blame without protest (they really couldn't otherwise),
and didn't give me any grief when I said that they'd be repairing the car back to factory spec regardless of price.