I know that revenue management is complicated voodoo magic. My question/scenario is this: If i go to Kayak or any airline's page to check out the price for a ticket. My brother looked for tickets home from FLL in April and put in a search for 8 tickets on Kayak and DL and it showed availability and a certain price. My sister and brother went to buy their respective tickets. My sister got in and then when he went to buy, it was no longer available and it went up. To me, it means that his order went into a different fare bucket (he thinks someone/program saw that and automatically kicked it up) because my sister bought the first batch out. I guess my question is that number that they show me for said amount of seats going to stay if I didn't break the purchase up into two parts?