pub fn item_price(ctx: &ItemPriceCtx<'_>) -> Result<Vec<ESCurrencyUnit>>Expand description
Sell price of an item, from its effectiveness eff via
balance::sell_price (Phase 2: sub-linear in eff so gold income grows
~linearly with item level — model’s linear-income assumption — letting the
geometric chest-upgrade cost bind instead of being swamped by surplus; early
low-eff sales stay ≈ the legacy eff·100).