Advice buying a car from toyota dealer?

my mum has just payed a deposit of £500 on a rav 4 at a toyota dealer. The car has 2000 miles on the clock and the total price is £24000.00. I have checked on the 'what car' web site and the target price on this car new is £21980.00. could anyone explain why the dealer is selling a used car for more than a... show more my mum has just payed a deposit of £500 on a rav 4 at a toyota dealer. The car has 2000 miles on the clock and the total price is £24000.00. I have checked on the 'what car' web site and the target price on this car new is £21980.00. could anyone explain why the dealer is selling a used car for more than a new one. should my mum go through with this deal? thanks
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