Reference article
Prize Machine
The Prize Machine turns a run’s reward keys into egg openings or a coin payout.
Rewards
Each opening consumes a key and can award coins or gems, or be unlucky. Super Prize Egg switches the machine to its improved egg reward mode.
Selling
Selling converts all remaining keys to coins using the machine’s configured key price. The checked Prize Machine scene sets 300 coins per key; verify other editions before treating that value as universal.