So if you repainted the car with paint that came from the same place that originally supplied it to BMW, the paint would still be "original"?
The actual ad says this:
“BMW UNRESTORED ORIGINAL CONDITION”so it is "all original" except for the parts that have been re-chromed.
and the rubber exterior pieces that have all been replaced.
and the wheels blasted and repainted.
and radial tires instead of the original 520x10 Bias Ply
and the sealant applied to the interior of the gas tank
and new shocks
and the engine shrouds repainted
and a new windscreen
and a replacement speedometer
and new exterior emblems
Its not a bad car. But the way you have described it is highly misleading.
A car is only original once. When you start replacing parts, rechroming things, it is no longer "original".