Wild Crab
Holds the Summer Bazaar · paid in shells
What you can buy, affinity tier by affinity tier
A single rung. All 15 offers are there on day one.
Nine resources, four skins, one crate and one harvest crate always on the shelf, and nothing that rotates. The number after the price is the purchase cap in total.
The four counters
Every merchant buys back its own categories, and no two lists ever overlap: what Wild Crab turns down, someone else takes, and no item has two buyers.
An item that falls into none of the nine bought-back categories has no buyer in the game. That is the case for every raw resource, and it is not a blacklist: their buyback price falls to zero on its own.
A crossing only a derived page makes: two permanent counters out of three are held by a merchant who lives elsewhere. Thalor the Gatekeeper and Myrrha the Enchantress both live in the Tower, yet hold two counters elsewhere: the Village and the Capital. A single counter is held by a merchant who lives on site: Selene. The wiki does not have to settle which is right: it shows both fields side by side, which no hand-written page would have noticed.