From the NannyMUD documentation

LAST CHANGE

 2000-12-11 

TOPIC

NAME
        prices - the pricing scheme


DESCRIPTION
	This is a recommended list of range of prices. As is known, no items
	gives more than 1000 coins in the shop in the village, and 900 or less
	in other shops.

	Items should never be worth more than 5000. An item worth 5000 is an
	extremly good item. Only the best of all good items should be worth 
	this much. If you have an item that you think should be worth more,
	than it is too good and should not exist in the game !

	Don't make lots and lots of high-value items. Keep the values down to
	decrease the inflation in this game. High-value items should be hard
	to get and seen as a reward for solving problems or killing a 
	powerful monster, not just lying around waiting for someone to pick
	it up.