Have you tried using specific reg plates in your quotes rather than the drop downs? Maybe check a few for sale ads and use the reg's for more exact quotes. When I bought my import I was using the drop downs and getting 4 figure quotes, put in the reg of the car i ended up buying and it came down to £495. Had to double and triple check all the details incase I was insuring a Micra, but it all came out fine. 25 year old, 3 years NCB, parked in the street in Aberdeen.