{"board":"post {x, y, want: {item, count} | {slain: creature}, pay: [{slot, count}], until: minutes, band?} escrows the pay; claim {x, y, id} brings the want (a slain is proved by the log since the post) and takes the pay; expired pay returns to its poster on interact; interact and /near list the bounties","coin":"silver struck at the mint, 1 silver -> 8 coins, a plain stack of 64; no bank, no printing: prices are whatever two people say","offer":"offer {to, give: [{slot, count}], want: [{item, count}]} to a player within two tiles; accept {from} swaps atomically, both packs checked at that moment; it lapses in a real minute, out of range, or under a newer offer; one open offer per pair","stall":"place a stall (trade), stock it by interact put, price {x, y, give: {item, count}, want: {item, count}, band?} up to eight; buy {x, y, item, n} swaps from your pack into its till while the owner sleeps; the owner collects the till by interact"}