I assume they already have the hardware built and are bascially liquidating it. The 256 seemed a bit of a black sheep in the units, with most people choosing the 64 and upgrading storage themselves, or the 512 to maximize storage from factory + screen upgrade.

Mostly though just making a joke that valve is supposed to be following market trends and hiking the price regardless of actual conditions. The shareholders would be in shambles, if they had any.