I've got last months Parkers Price guide and it says:
Plate Main Dealer Independent Dealer Private Part Ex
55 3dr 13,750 13,050 11,875 10,310
56 3dr 14,870 14,280 13,250 11,775
55 3dr DSG 14,080 13,540 12,320 10,695
56 3dr DSD 15,445 14,835 13,760 12,225
55 5dr 13,960 13,420 12,210 10,595
56 5dr 15,285 14,680 13,615 12,095
55 5dr DSG 14,520 13,960 12,705 11,030
56 5dr DSG 15,850 15,220 14,120 12,545
Then it jumps to an 09 plate, but you should be able to get a rough idea

It'd be a part ex. I assume?