Hou Niao decided to first buy a map of the islands in the Outer Sea.
Maps of the overseas territories are hot commodities, everyone has one, the key point is that this item is not static, but constantly changing.
The prices range from high to low, with the cheapest being three low-grade Spirit Stones for one map, while the most expensive can sell for hundreds of Spirit Stones, and there's even an automatically updating Lizhi Sea map treasure that sells for thousands of Spirit Stones.
Such a huge price difference in maps comes down to whether they are updated in real-time; the cheapest kind, at three Spirit Stones each, only lists the specific locations of the thousands of islands in the Outer Sea, which of course isn't worth much since other than providing locations, they serve no other function.