Hello Ann,
In relation to your question raised by Trevor's sound advice " How would you know if miles are proper......?" I think the answer to that is fairly simple to research. I have mentioned before under other such posts that although service history is important, it is likely to be more important to know how the car has been used and cared for.
Easy to ascertain? Well, I think it is ( but more often than not overlooked). If you are not buying direct from the owner, then you obtain the last keeper's contact details from the V5 and you discuss the merits or otherwise, of the car. The true story of the car lies there. If the dealer is reluctant to give you that contact - data protection and all that! - then ask them to ask the last owner if they will contact you. If that doesn't work, then walk away. Short term ownership with last owner? Very often not a good sign.
Good luck with finding what you want, but just think - would you buy a pup from a dealer without at least talking to the owner of the !Removed!? Pedigrees are all well and good, but how something has been cared for is important too. Do as much homework as possible before shaking anyone's hand.
Kind regards.
Gareth.