Automotive panels can be purchased from auto body shops, junkyards and classified ads. As opposed to the other options, auto body shops offer brand new machined pieces that are balanced and ready to be mounted to the vehicle.
Auto body shops are the most reliable place to purchase automotive panels. The shops sculpt the panels and ensure the pieces fit the vehicle.
Junkyards require the panels to be removed from donor vehicles. Unfortunately, junkyard panels can have dents that throw off the geometry of the car. However, the panels are usually offered with a warranty to ensure they fit.
Classified websites allow buyers to find suitable car parts, which can decrease the overall price of the panel. Although it may be the most inexpensive option, classified ads are generally considered to be a hit or miss when buying auto parts.