Raffles are regularly held competitions which provide the player base with an opportunity to win exclusive and high-end prizes. Depending on the raffle, you will be able to purchase tickets with donation coins and/or gold.
How to buy tickets
Type "[Raffles" in game to bring up the raffles gump. This will tell you if there is currently a raffle running:
You can also load up the raffles gump by double-clicking the special vendor Aleron who can be found on the south west corner of West Britain Bank: