Yes, they all sold out this year, price is $300 or close to that now for all areas. The most popular areas sell out in less than 10 minutes. So I have no doubt that they'd still sell out if the price was $500.
I think all the areas are now a full year of access, and camping is allowed, along with 2 cords of firewood. So you do get more for your money now than how it was in the beginning.