I have just signed forms to purchased a used car from a dealership and have paid a small deposit. Returning home I have found the exact same car (can see the registration plate) for cheaper on the dealer’s website and advertised even cheaper on Auto Trader. At the dealership I went through price negotiations with the dealer and he said that he has reduced the original price by a few hundred, but even the final price we settled on is higher than the online sites. The dealer told me there was no way he could go any lower Do I have a case to complain and do they need to honour the online price?