I totalled a 2007 GSA and was able to negotiate a bit. Make sure you document the options that are on the bike, including ABS, trip computer, fog lights and things like that. Those were options and they should be added to the value of the bike. Ask your dealer to give you a print out of the options based on your VIN.
Also, get a list of farkles and print out web prices for each.
My claim ended up $3000 higher than the original offer and they really didn't argue with me.