They are high
.
They justify it as follows: people buy the mini anyway! Don't forget, charging disproportionate prices isn't a crime, sadly, so they don't have to justify anything so long as people buy them. I think the excuse for the price rise to the public is that they compensate for inflation, raised wages, higher VAT etc., it's just that added up, these don't come in at the added percentage, but a lot lower (at least in Holland).
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"... Telchar wrought it in the deeps of time."
-On Andùril, The Lord of the Rings