From my perspective, there is definite inconsistency in the pricing, when all conditions are held equal
Void Opals are imports for Refinery (as you point out) and Tourism.
I fetched prices for
- Tourism economy, 0 demand, CL/Inv/PA, price was 600k
- Ex+Ref economy, 0 demand, CL/Boom/PA, price was 1.4m
Given these are
both import economies, there should be no discrepancy. I would argue the Ex + Ref economy should be 600k (given it has 0 demand), not 1.4m (or 1.6 as you mention, presumably for a CL/Inv/PA state.
The change is
meant to change price based on demand, and the Ex + Ref is clearly not doing that.
EDIT: Alternately, it's the Tourism price that's out of whack, and it should be the same as the Ex + Ref (i.e 1.4-1.6m, depending on state), in which case the change does virtually nothing.