Bukkit

Something that would be nice to have, would be a way to limit a player's transactions per time period.  Something like this would be particularly useful for AdminShops.

As an example, with this feature, I would be able to create an admin shop that sells Diamond Helmets, and above the shop I could place a sign with a macro that effectively says "sell 1 per player per 24 hours", which would mean that this shop only sells 1 item per player every 24 hours.

Ideally, something like this would also work along side of the "[restricted]" sign feature, allowing you to put limits on particular groups.  For example, I could create two shops with the same items, one restricted to group A with a limit of 1, another restricted to group B with a limit of 2.

An extension of this (although would not be as useful to me personally), would be a total transaction limit on a ChestShop.  For instance, a shop that will only sell 10 per 24 hours, or buy 10 per 24 hours across all players, allowing an AdminShop to be virtually "sold out" of a particular item.