In our family, we have always referred to him as the Chicken Man.
In Oberursel-Nord, he is on the parking lot in front of the the EDEKA supermarket every Monday and Thursday. Half a chicken (German: ein halbes Hähnchen, bitte) is sold at euro 3,50, so he gets good business at this reasonable price.
Not only are the prices reasonable, but the food is very good as well.
On a more personal note – the Chicken Man just lost one of his regular customers… as our college-bound son is on his way to England right now, sitting on a Lufthansa flight. I am sure he will miss it at times.