Free to play...
You get 2 character slots, 28 inventory slots, 0 auction slots, 12 bank slots, cannot do any item/money trades, are allowed 1500 cash, 6 text chat messages per 30 seconds, one vault ticket per week, and can join a guild.
The premiums (spend $5 on the game. I already spent $25 on two dlc's and some wearable items) get 6 character slots, 42 inventory slots,
5 auction slots, 24 bank slots, can trade items, are allowed 2000 cash, proximity voice chat and 6 text chat messages per 30 seconds, one vault ticket every 3 days, and can join a guild.