That is the same stove as the 401, just smaller. I don't know if this smaller model is a double heater or not. These are less common than the larger ones. If you want a mid sized stove, this would be a good one.
Just make sure that it is complete and take a flashlight with you. Take your time and look inside the fire pot and down in the ash pit area. Look for defects. If you have any further questions after you look at it. Ask away.