People change their cars for many reasons. Sometimes people will decide to change their car because they need a bigger one due to a new family member or they may want to change it because it is getting too old or is becoming high mileage. Whenever you are looking at getting a new car you have a few things to consider first. Knowing how you are going to pay for the car will often be one of the first decisions you need to make. If you have a car that you will need to sell first in order to use money towards a new one, then you will have to think about whether you are going to part exchange it or try and sell it privately. If you are going to be having finance to fund the purchase of the vehicle, then you may want to do a bit of shopping around first to find the best deal whether that be dealership finance or a personal loan.
You can often get the best deal on buying a car if you have no part exchange and are a cash buyer, so ideally you would want to sell your car first and possibly get a loan before you approach the garage to buy a new one.