Some of the key factors that may affect the price of a used camera include the condition of the battery compartment and lens, the shutter count and the physical appearance of the external shell of the camera. Additionally, if the accessories that came with the new camera are missing or in poor condition, the camera may sell for a lower price.
The overall lens condition of the camera has a significant influence on the price of the used camera. Any scratches on the front and rear lens elements of the camera, dust or fungus on the mirror box, brass on the camera lens and loose pins in the lens terminals are likely to reduce the price.
If the battery compartment is corroded or the compartment doors don't shut properly, the camera may not be in great condition and is likely to sell for less. The LCD screen needs to be inspected closely too for dead pixels, discoloration, or cracks in the plastic coating. If there is evidence of any damage, it will influence pricing.
The shutter count should be examined to check the number of actuations that the shutter has completed. This helps determine the remaining life of the shutter before it needs to be replaced.
If peripherals such as the manual, battery charger, lens caps and interface cables are missing or are not in working order, the camera price would generally decrease.
Finally, the physical appearance of the shell of the camera and the camera strap usually has a bearing on price. If the shell has scratches or the strap has faded and looks worn out, the price of the camera may drop.