Depends on the situation. Our rates have expiration dates attached to them, so if the price went up before our negotiated rate expired, we will eat it. If the rates expired, we leave it to the judgment of their account manager on what to do.
just out of curiosity - the value that your customers see...is it actual cost + your fee? (hence you can collect the fee even if the actual cost reduces?)
Yeah, classic brokerage biz model. We contract in bulk with asset owners and sell piecemeal.