I did add the 3.6 master cylinder seal kit, onto list. What's interesting is they had no idea there was any demand for this part! Their only way to gauge demand is via the JCP site, relying on people clicking the "contact us" link.
I do agree, some essential parts owners will pay, for the brakes, engine or suspension.
But who here is willing to pay £275+vat for a lower radiator cradle? That's a new stock part, so gives an example of the relative price point new parts will likely be pitched at in order to be seen as viable.