If you want to know how the 1M was configured upon leaving the BMW Leipzig production plant and its precise production date, type the last 7 characters of the VIN in the BMW VIN Decoder:
http://www.bmwarchiv.de/vin/
By doing so, you know the car's age + what options were initially included/missing without even having seen the car up close.
For the rest, the usual
caveat emptor.