I got this idea. How awesome would it be to have a mazes and cataombs of playercreated dungeons. And even though it would be pretty interesting on its own to explore a citys catacombs, even more fascinating and catching it would be if there was prices and secret rooms that were to find there, holding a special treat for the finders. Only problem is, with a shop stand, only the first finder really gets the reward 
So my idea would be this: we need some kind of option on the shop stand to make it so it only gives one item to each individual player that wants to get something from it. (this would also be very interesting for shops, they could have giveaways for first time customers 
)
EDIT: maybe one could do it like this: an option to the shop-stand that it gives out only one item every so often on a timer (like every 8 hours), so that one beacon would hold some kind of individualizable token/key (like a banknote that has an individual id numer that is ongoing). this token then could be used on another shopstand that would have to be setable to only accept that one kind of custom token for excange of an item in its inventory. its like a voucher sytem xD
