Keep the fact in mind that a quotation is no one’s copyright. When buyers reach a vendor and ask them to provide quotations or quotes according to their requirements, then sellers or vendors generate the quotes. Generally, the quotes that the vendors provide are considered to be similar for all the car dealers.
However, minor differences may be noted in some of the cases. When you seek for a new car quote, the vendor analyzes your requirements or preferences first and then delivers the quotes for different cars that more or less match your preferences. Price of a car is same for different dealer, but minor changes in price of the quotation happens due to certain offers from the vendors. For example, if a vendor has decided to provide free servicing for a certain period, then the quotation will look cheaper than them, who do not have such offers.
However, quotes may differ vastly in case of used cars. There is no fixed price in case of used cars and that is why quotes vary a lot. So, if you are planning for buying used car, your approach for collecting quotes should be different from new car buying approach. In case of used cars, try to get quotes as many as possible from distinguished vendors.