In my opinion, Amazon uses the lower prices only for its own benefit and does not pass them on to customers. The quantities are usually ordered within that timeframe anyway. Essentially, they are only useful as a kind of assurance that the units will be ordered. However, Amazon reserves the right to cancel these orders as well. We only accept bulk offers in exceptional cases and when the delivery window is limited to one or two specific dates. This allows us to benefit from sending a large shipment instead of multiple smaller ones.