Not sure who you called but that's crazy....
I have used Swann Insurance (bike specialists) and GIO (one of the few big companies doing two wheelers).
I'd expect full comp. cover for yours to be somewhere around $1,500 maybe even less.
You will find some stupid prices quoted so just keep ringing (ask the local bike shop who they recommend too) and you'll get something reasonable
Is it weird in here, or is it just me?