As with all products, before purchasing an endoscope, look for the exact perimeters you need to avoid the need to repurchase a different product. Consider your budget carefully and avoid an endoscope that does not work with the operating system of your choice. If the device has connectivity issues, it's best to avoid them as it will not be reliable. Also, avoid very short cord lengths too as that limits your access options. Finally, if the endoscope does not have accessories, it's best to find an option that does. Upon buying an endoscope, check for issues before the first use. Make sure the light functions and the camera image is clear. If you find cracks, dings, or other issues, return the product.