FrontierShop

/shop opens a category-based server shop (the shipped catalog has 8 categories and 119 items; mc.pvpers.us runs 200) where every slot is its own terminal (left-click buy 1, shift-left buy a stack, right-click sell 1, shift-right sell everything matching), and /market opens a player market for listing your own items at your own price.

Prices ride a daily ticker: each item has a price index that re-prices *once a day at local midnight* from yesterday’s net player flow (clamped 60–140 %), buy and sell both ride the same index so the spread never changes and a dumped item eventually becomes cheap to buy back. Prices never move mid-day; the anti-farm guard is a daily warehouse cap (by default the server buys at most appetite × 5 of each item per day) rather than price-crushing, and only plain, unenchanted, undamaged items sell. Past the cap (or past your own share of it) the shop doesn’t refuse: it keeps buying at a tapering rate, 50 % of today’s sell price for the next allowance-width of units, then 25 %, then 10 % until midnight. Tapered units count per player and per connection, use no warehouse room and don’t push the price down further. On top of the cap: each player (and each connection) may sell only a share of it at full price, the cap scales with active players, and the warehouse won’t buy from you until you’ve played 30 non-AFK minutes that week. mc.pvpers.us runs a tighter ticker (warehouse ×1, index 30–140 %, daily moves up to 10 % with a 15 % pull back toward par).

Land upkeep (with Lands): claimed chunks cost a daily upkeep. An active land that can’t pay keeps its chunks and goes into debt — no new claims or bank withdrawals, and deposits pay the debt first — and only unclaims once inactive or after too long in debt (14 days on mc.pvpers.us). Unclaimed chunks can be reclaimed free for 30 days with /upkeep reclaim. An optional town discount lowers upkeep for lands with active members (on at mc.pvpers.us, off by default). Villager trade discounts from curing, Hero of the Village and gossip are stripped.

On top of that: seeded daily deals, [shop] sign shops on chests, and a buy-only black market that opens on fixed weekly windows with per-window stock and rosters that rotate by weekday — selling vanilla contraband you can’t normally get in survival (spawn eggs, mob heads, loot-only gear), captured mob spawners, and five tiered custom trinkets plus three consumables that players level up at an Upgrade Station.