Sorting out what is in or out of the collection

To date I have a spreasdsheet on Google Documents that contains 37 motorcycles. I am sure the collection is not 37 motorcycles as I know at least 2 on this list have been sold. The list is derived from the paperwork Mark held and the motorcycles we have observed. In some cases the bikes have not yet been registered for this country and therefore there is no log book. Below is a selection of motorcycles that greets you as you enter the cellar.

The other room to the front of the house contains 2 more motorcycles and then wall to wall parts from MZ's to Panthers.