Aftermarket auto body parts should be bought only from trusted sellers. Whether you're buying from a company or a private seller, it's good to make sure the parts are well made. Get tips on how to do that and more by reading on. Parts for your vehicle should be in nice shape when you order them. Don't put something on your car, truck, or anything else that looks like it has seen better days. Sure, it may be cheap to have aftermarket mirrors, but think of the danger you would be in if they fell off during a drive or something else happened like them flying off the vehicle into another person. Try to steer clear of parts that you think look poorly made or you may end up not saving money at all if they cause you costly and dangerous problems.
Aftermarket fenders can be found sometimes at places like a local auto junkyard type of place. But it's sometimes even easier and cheaper to get aftermarket parts because you can get something that is going to fit. Sometimes you'll have to go look at a junkyard a lot of times before you find what you need. Considering that your time is worth money, if you're not getting any parts when you go out because they aren't available, you're pretty much spending more on this than aftermarket types of parts would cost you overall.
Figure out what you're going to have to pay for the parts you want, and make sure you compare them to others. Sometimes it's worth it to pay a little more for things like bumpers if you want to know that they will withstand the test of time. You can get a price from at least 3 places if the part is easy to find when shopping, and that allows for you to figure out the average price. If anything is super low in price then be careful as that may indicate there's something wrong with the quality or that it's heavily used.
Private sellers may exist in your area. Just keep an eye on classified ads in the paper or online and if someone says they have some aftermarket parts, you can meet up with them in public to check them out. The reason this is good to know is that people who sell this way are going to give you a far better deal than if you were buying from a retailer. But, you should still double check prices before you make a decision. Ask for photos before heading out so you can see if there are obvious problems that would make it a waste of your time to go look at. Many great aftermarket auto body parts can be found for a much better deal than the ones from vehicle makers. To be safe, you have to go with quality parts that are not going to fail on you. Something like bad car hoods could come flying up and cause a bad accident, so be mindful of what you're purchasing!