Fair price is our robust model: take the last 14 daily average prices, drop the current (live, in-progress) day, drop the highest & lowest couple of completed days, then take a recency-weighted average of the rest. It tracks real moves but a single buyout spike or troll listing can't sway it.
What "Liquid" means. The market API gives no trade volume, so we judge liquidity from price behaviour scaled by value (a stand-in for dollar volume): an item shows in the default view only if it's an actual material / honing / fusion / cooking item (we hide engraving recipes, consumables and baubles), it has a full recent price history, and its 14-day price is steady within a limit that grows with its price — a high-value item can be a bit jumpier and still count (each trade moves real gold), while a cheap item must trade tightly to qualify. A hard ceiling still drops wildly-spiky items at any price, so dead-tier-but-expensive stones don't sneak back in. Raise Min value to hide cheap, low-stakes items, or hit Everything to see all items the API tracks.
Caveats. Prices are a snapshot (auto-refreshed every few hours); we don't label per-unit vs. per-stack on every item, but the deal % is unit-independent. Hover a sparkline for the daily values.