Any reputable used auto parts outlet should be able to sell you operable parts and usable components, but you should be able to have enough working knowledge about smarter options. In the age of Internet where you can get almost any information you need at the few clicks of a button, there’s no excuse to skip research when your intention is to save some money in the first place. Visit your local used auto parts outlet and get some ideas on costs.
There are some aftermarket auto parts you can tolerably purchase and be satisfied with your bargain. Body parts or sheet metal can be bought used. However, the panels have to be an original equipment material (OEM), made from the car brand and make itself. The point is they have to wear well like a well-tailored suit; nothing breaks the look of your Honda Accord Sedan EX-L than an ill-fitting body part.
In searching for a good used aftermarket part seller, look for one who can guarantee that the product is quite as good as the original. You can get good rebuilt engines if you know how reputable the rebuilder is; same as well with the reputation of the dismantler of used engines. You don’t want a supposedly rebuilt engine smoking out on you after a few thousand miles.