I know that I can make a reservation now, and say I'll pay at the station and they'll hold my reservation, but for how long? I'm looking to do some after Christmas time travel and I would like to book it now, but don't have the money just yet (I'll have it in a couple weeks). Also, I'd like to hold out for the fall Buy Points promotion for AGR but don't want the roomettes to get all booked by then.