That illustrates my point, if those figures are even slightly accurate. If a dealer takes those cars in PX and sells them at the dealer prices then there is only slightly more than £2k profit in the car before they even think about servicing, tax, mot, valeting and warranties...
Getting a dealer to knock off £2.5k is unrealistic imo. Dealers have no emotive reason to sell. Your more likely to get a desperate private seller to do that imo........