The Fall Festival (also called the Harvest Festival or Harvestmath) has started, scheduled to run through November 2nd.
Of particular interest for level-cap characters are Anfalas Star-lit Crystals for 90 Fall Festival Tokens and Essence Reclamation Scrolls for 140 Fall Festival Tokens. As usual, the Star-lit Crystals are Bind on Acquire, so must be bartered by the character that is going to use them. The Essence Reclamation Scrolls are not bound, so can be sold, traded, or passed to other characters.
There are new dyes available: 6 Imladris Fallen Leaf Dyes or 6 Asheslades Green Dyes for 20 Fall Festival Tokens, and 6 Autumn Leaf Dyes or 6 Twilight Purple Dyes for 10 Mithril Coins. These dyes are available only during the festival, so they may become valuable. I have been selling Shire Plum, Bullroarer's Green, Sunset Orange, and Rohan Green dyes from the Spring and Summer Festivals. The market is very thin. I've sold over 200 Shire Plum, but only 3 Rohan Green, so it is hard to predict demand. Of course, if you like the colours and think you might want to use them, you need to stock up now.