Market is the right place to buy items you might need. It's spread across 4 different shops, items in each shop refreshed every 8 hours. Shop's timer starts upon first visit to the shop after the point when it would end. It's also possible to speed up shop timer for 42 Kobans.
All items are sub-divided into 4 rarity categories:
The higher the rarity, the better the item's quality. Note, you are also capable of buying stats in the Equipment & Booster shops using the little "+" button shown beside them. A cap of how much you can buy depends on your level. You can buy a stat 30 times per level. Only the main 3 attack stats can be bought.
Equipment |
Boosters |
Books |
Gifts |
Also, this area doubles your inventory log, so you can go there to: