Over 30K in engine build reciepts but that included carbs etc. Reputable builder and very few miles on the engine. ...probably 3000 miles or so since built. ...have over 40K in pretty recent receipts including trans rebuild, big brakes, interior etc. It is one of the nicer SCs that I've driven. I personally do not care for the Weissach interior too much but it is unique.
At 15 for a roller it wouldn't make sense for me. At 20K I could start thinking about making a deal happen. I want the 25-30K motor at a deep discount.