My Insurance company value my CSL at £19500

[Vito]

Hi All

On the 09/04/10 I crashed my CSL straight into a wall head on it was so bad they had to cut the roof off to get me out. I spent the night in hospital and the next day got out and was back to work within 2 weeks. So all good until this morning when the insurance gave me my offer £19500. I asked the guy if he was joking but he said no that was there offer that is the glasses guide value.

Can anyone help me with this has anyone had experience with an insurance company dealing with a write off value.

Details on my car for a value (what do you think)

BMW M3 CSL 100% original
Silver Grey
Reg date 30/09/04 build date dec 2003
3 previous owners
39000 miles
Spec
BMW Business CD
Rear park distance control
Cup wheels
Air Con
Xenon lights
All books, keys and owners wallet as new
Just serviced Feb 2010, Tax, MOT, wheels refurbished and had a full detailed valet

Full BMW main dealer service history
Pre-delivery check 29/09/04
Running-in check 1062 miles 04/01/05
Brake fluid 7124 miles 10/04/06
Oil service 10,317 miles 15/02/07
Brake fluid 23,968 miles 05/05/08
Inspection 1 / Micro-filter 23,968 miles 05/05/08
Oil service / Micro-filter 36,930 miles 16/02/10
Brake fluid 36,935 miles 17/02/10
I sent everything to the insurance they required
V5 reg doc/MOT
All Keys
FBMWSH service book
Copy of my licence
Original cert insurance
Photos of my car before and after the crash
I printed of all the CSLs for sale on piston heads and auto trader as a guide with around the same miles.
CSL buyers guide
Please help my car must be worth more than £19500
Regards
Vito