Any hpi guru's on board?

Im looking for a 525d m sport, found a lovely one on ebay so goes to look. Car is fine few marks etc so agree a price. Bloke shows me hpi report etc all clear, so I leave a £100 deposit and agree to pick car up in few hours. Something was bugging me so I done a hpi phone check and it came back as a cat d? I contact seller and he says its his private plate that's on the list not the car? Can this be true or is he talking utter bollocks.

Cheers