What available (not EOL such as Kinect) low cost camera works best with RTAB-Map for indoor and outdoor SLAM and navigation of a robot?
Is it best to have a stereo RGB camera (such as the ZED or the PS4 camera) or RGBD camera (such as Intel Realsense D435 or Orbbec Astra Pro)?
RGB-D cameras like kinect are better for indoor reconstruction (in particular those with TOF depth camera technology).
Stereo cameras are better for localization indoor/outdoor, and for outdoor reconstruction.
Stereo IR cameras with IR pattern (like realsense) are better than RGB stereo cameras for indoor reconstruction (but not as good as RGB-D cameras).
For a more specific answer, you may detail more about the application.