

The market is purely player-driven. If your game progress is ahead of most players, there may simply be no one selling high-level items yet.
Your market level is too low to view items below your current level range.
→ Leveling up your Shopkeeper increases your market level and visibility.
Yes. Both Gold and PAL trades are subject to different tax rates, and the order creator is responsible for paying the tax.
Yes. The maximum Gold price for an item is 10x its base value.
For example, an item with a base value of 3,000 Gold can be listed for up to 30,000 Gold.