I'm of the opinion indifference is a temporary state of mind that, when encountered, forces one to decide one way or another. If it wasn't, the binary question "would you like to buy this" is unanswerable, as if in some perpetual superposition of yes/no.

This, evidently, doesn't ever happen in the real world: in reality, you'd take into account whether you have time to buy it, whether you have the will to carry it around, etc., before arriving at a definite answer that implies (value - price) has collapsed to some non-zero value.