I've extensively researched the history of prototypes and know a fair amount about them as well as the pre-production cars. Here goes...the first prototype with the Citroen 4 cylinder engine is in a private collection in Nevada. It is the subject of a feature article in an upcoming issue of "deloreans". The owner is proud of the car, but very protective. I don't expect we will see the car publicly displayed in the near future. But I'm working on him. :-) The second prototype was sent off to Lotus for "evaluation". This car never returned to the states and I went to Lotus last year (at their invitation on another matter) and spoke to several people about it. Everyone was in agreement that it was destroyed in the late 1990's. Photos of that era show it seemingly abandoned and in VERY poor condition. Dozens of prototypes were built at built at Lotus (cars with fiberglass bodies) and destroyed or disassembled according to sources at Lotus. I believe all the pre-production cars were built at Dunmurry (in the late months of 1980 as production loomed). They were numbered, a prefixed with a "D". One would imagine they started at "D01", but no documentation has surfaced to prove that. There is documentation (dated 12/31/81) of the existence of cars numbered D19, D20, D21, and D28. These are referred to on different documents as "pilot builds" or "engineering mules". Two or three of these pre- production cars have survived - the one on the DMC-News web site which I believe is D28 (current whereabouts unknown) and Sascha Skucek's car (sorry if I spelled your name wrong). I think we determined that Sascha's car is D20. Based on the dates of that document, I am inclined to think that only those four pre-production cars came to the states, the rest having stayed in Dunmurry. Between late Jan 1981 and April 1981, several hundred (the actual number is unknown at this time) of what's come to be called the "black cars" were built. Exactly what became of these cars is unknown as well. Regular production started at VIN #500, though the first 60 were not intended for retail sale, and a document exists saying that there was to be no warranty coverage on those cars. SSI says production started in April, but several cars exist with build dates of March. The earliest documented retail sale VIN is 635, the first known public sale was June 17, 1981 in Beverly Hills, CA (VIN 910). I doubt any cars were sold retail prior to that date, as cars didn't arrive in the US until early June of 1981. We all know there are lower VIN's in private hands now, though most (if not all) can be established as having previously been company cars originally, and were only sold later as company finances deteriorated and they were forced to sell those cars. Those cars were sold through a company called "Chestnut Fleet Leasing" and these cars are sometimes referred to as the "Chestnut Fleet" cars. James Espey DMC (Texas) http://www.delorean.com