Anyway, when I was paying for the lot the Manager didn't discount the Miele washing machine as he said that he made Euro40 on it (it cost about Euro1100) and I got the impression that the margins were so small that he couldn't discount it not that Miele would not allow him so maybe thats the reason.
I doubt this is the full story of what's going on: a 3.6% margin on a product like that isn't really credible, as it would be unlikely to cover enough of their costs to make dealing with them worthwhile. Having said that, I don't know anything about that particular business.
If it's true, maybe they get a bonus every six months, based on targets? maybe even the target is one unit? There are plenty of ways one could think of to circumvent (or break?) the law here.