Since rules were changed to force teams to show games even without sellouts teams have been selling tickets to ticket brokers and travel agents who sold to out of town fans and it is easiest to sell tickets in opposition team home area. Evidently they pay more than list price and then these tickets are bundled with hotels, buses, plane tickets, tailgates, etc. into packages. Bills used to sell to visiting Bills fans groups but stopped selling to them once these deals were made.