pricing adjustments to reduce exploitation

[finndo77]

some items have a value that is just too high and I have seen players farming them to build up extreme balances. While I recommend never opening a full item list admin shop with any amount of items, I have begun setting up some trade signs with very high valued creative only items in them to give players a goal to work towards and a cash dump to keep balances from skyrocketing. Example villager spawn eggs at $500,000 and then limiting the amount available to 2-4 total without indicating if I will restock later. I am considering putting spawners up for a few million, as it only took about 2 weeks of moderate play time for one player to reach $400,000 by himself, although I believe he sold a bunch of his storage items from when this particular server was a snapshot server and did not have any plugins.

[finndo77]

changed phantom membranes from $35 to $25 as not sleeping at all and using a looting 3 sword can make a single player multiple diamonds per night by just setting up a dirt hut and standing in the doorway.