Inevitably, if you own a vehicle you will eventually need parts for it. It doesn't matter if your car is 30 years old or 5 years old, sometimes you have to get additional replacement parts even if it is something as simple as a light bulb. Whatever the case may be, there are numerous places you can look into to find the parts but you want to try to find them at the best price as well.
Many people feel compelled to pay the price for brand new parts if they have a newer vehicle and if they shop at their dealer or at a local auto parts store they will probably pay the highest price possible. The thing to remember however is that there are probably tons of cars just like yours with the same parts that will work perfectly on your car lying around in wrecking yards or even on the internet. The best thing about this is that these parts can be found at a fraction of the cost of a new part and in most cases will work just as good and last just as long.
For vehicles that are only ten years old or so you will be able to find all kinds of parts for them at a local auto wrecker. They usually have a plethora of parts like windshields, mirrors, radiators, wheels, and even motors! You can save a ton of money this way. I remember having to buy a shift assembly for a Dodge Neon for my son, the dealer wanted nearly $200, I got it at a local salvage yard for $20 and they removed it for me! Some of the better ones will even have the parts they have available listed on a computer so all you have to do is ask if they have the part or not.
If you have an older vehicle it is sometimes difficult to find the part at a reasonable price due to supply and demand and the fact that they just don't keep that many parts around for vintage vehicles. If this is your situation the best place may be the internet. There are numerous online parts stores that will have access to parts like these and if all else fails you can also try eBay. I have had great success finding parts for rare vehicles there.
If you own a vehicle that was made in the early sixties or before you will probably have a tough time finding parts that are inexpensive. In most cases the parts will be rare and difficult to find and the rarer they are the more they are going to cost. It may be best to check all of the salvage yards in your area first, and then check out used car locaters online who may be able to help you find what you are looking for. Many of these sources have networks of parts houses that may have what you need.