Resale listings are shown on our seat maps as pink dots. The full number of seats listed is always shown, even if some of those seats have been sold, so you may not be able to buy them all.
You will be able to select the maximum number of seats available on the seat selection page. If this number is less than the number of seats on the map, then some of the listing has already been sold and you won't be able to go back and purchase more seats from that range.
If you require more seats, you will need to select from a different range of available seats.