variable currency idea

[schepers12]

what i actually mean is: lets say a user buys a certain pet, which has been bought 1 time that day/week/month, resulting in it's price goin slightly up for everyone (just like in real life, when people are massively buying a product, then the price goes up) and when it hasn't been bought for a while, the price goes down (where you can specify the maximum increase and decrease values in percent in the admincp.

i hope this is clear enough.. ;)