 airline pricing you know um people are very familiar with the idea that the price of the airline ticket changes depending on when you're buying it like how close to the flight it is and sometimes whether you're logged in or not whether it knows that you have like rewards or status with that particular airline it might change the price does it also happen with like consumer products let's say i don't know vacuum cleaners people are used to hearing that about airlines you know when you book makes a difference etc but what about like consumer products