[alongub]

With the introduction of trading in the next major version, there is one topic that needs to be discussed first - dynamic economy. Right now, prices in the shop are completely static. They never change, unless the admin changes them. The "beautiful" thing in trading and free market is that people always try to sell items for higher prices and buy items for lower prices. This shifts the economy and makes it alive. If prices in the shop are static, this wouldn't ever happen.

That's why we need to think of an alternative, a more dynamic economy for the Store. It is based on one principal: prices in the shop should always change. But according to what? According to their popularity, according to their approximate trading value - I don't know. That's why I created this discussion.

I'd love to get your ideas on this, and eventually develop some kind of a formula or an algorithm for calculating an item's price on the new economy.

[serpentine]

Maybe according to the average price people are trading a particular item for.

[Morell]

Depend to demand of the item? More demand, more expensive. That way the people can sell at lower prices.

[Arrow768]

I would like a popularity based price, this would prevent that too many users have got the same item and make it boring.

$number_equipt --> Number of Players that have the item equipt
$number_max --> The maximum Players that can have the item (players in the store db)
$max_price --> The maximum Price of the item
$min_price --> The minimum Price of the Items

$current_price = $min_price + (($max_price - $min_price)/$number_max) * $number_equipt

This is just a linear function: "y = d + (dy/dx) * x" (d = delta)

I like this solution because its very simple and can still have a big effect

Going to create a more complex calculation and accurate calculation

[alongub]

Originally Posted by Morell Depend to demand of the item?

But how do you calculate an item's demand?

One idea that I've had is to represent an item's demand as its popularity over time (which is a function). Then, if you compare two items' popularity(time) functions, if item A's popularity(time) is more sloppy than item B's popularity(time), then item A has higher demand than item B.

But how would that help you to calculate the price? Remember, we're dealing with numbers here, so knowing if a demand is "high" or "low" compared to another isn't enough.

[alongub]

Originally Posted by Arrow768 I would like a popularity based price, this would prevent that too many users have got the same item and make it boring. $number_equipt --> Number of Players that have the item equipt $number_max --> The maximum Players that can have the item (players in the store db) $max_price --> The maximum Price of the item $min_price --> The minimum Price of the Items $current_price = $min_price + (($max_price - $min_price)/$number_max) * $number_equipt This is just a simple trigonometry: "y = d + (dy/dx) * x" (d = delta) I like this solution because its very simple and can still have a big effect Going to create a more complex calculation and accurate calculation

This is a nice solution, the problem is that it isn't affected by trading at all, only by shop.

[zloykif]

variant:
this is not dynamic prices but close.
Every item have static price in shop, but have amount, if players bought all and amount = 0, new supply will be after 48h for example. But players can trade, and sell items on black market, with high or low prices
sorry for bad english

[alongub]

Originally Posted by zloykif variant: this is not dynamic prices but close. Every item have static price in shop, but have amount, if players bought all and amount = 0, new supply will be after 48h for example. But players can trade, and sell items on black market, with high or low prices sorry for bad english

This is a really good idea, and much simpler than implementing a dynamic economy.

Is the amount of items global or per player?

[Arrow768]

I made a little PDF with the two options and some graphs how the function looks like
Its attached below

[zloykif]

Is the amount of items global or per player?

in my mind, global ofcourse because players not need more than 1, if items no have expire time