I'm a sucker for low mileage, odd ball cars. This one is a candidate..

Think how easy it would be to work on that little engine in that big engine compartment.They had to add a surround to hold the tiny 2002 radiator! Big car for only 100hp.
E12 were assembled nearly everywhere, BMW made nearly 60000 CKD sets. Several thousand more LHD cars were assembled in South Africa. Of course, that would ruin the dealer's story.To be precise, these BMWs were "assembled", not really made, in South Africa. The kits were sent from Germany for assembly. The 1.8L skew I think was meant to alleviate the taxes in countries that had big increases at 2L. They even had 315 and 316 skews for some countries.
The 1502 is a different matter I think. It was smaller engines in the mid 70s as a response to the 1973 Arab oil embargo and a similar phenomenon happened in US cars. I owned a 1502 and I loved the ride but it was underpowered for the hilly roads I was driving and I had to adjust the distributor angle to get optimal power to make the climbs...E12 were assembled nearly everywhere, BMW made nearly 60000 CKD sets. Several thousand more LHD cars were assembled in South Africa. Of course, that would ruin the dealer's story.
Usually there was no need to go smaller than 2 litres. Luxury tax in Italy started exactly there. In the Netherlands it depended on sales prices. Up to a certain sum no luxury tax, more expensive cars hefty taxation based on the whole price. At least that's what a friendly Dutchman explained when I was a boy.
1502, 2.5 CS, 315, 316, 518 and others were all part of the common range in Germany. though some only for a short time. We have special taxes for everything but never for prestigious goods. The only thing BMW did not try to sell here was the 725i E23.