Discussion: "Auction House" Do we REALLY need one?

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This is not required, in the standard implementation of 'stalls' and similar. It is less work to broadcast all information and changes relative to stalls to a player in the area than to set up a transactional check server for every time a single player actually interacts with a shop other than to make a purchase. Saves load times, for one thing.

That information can then be interpreted. Another method is simply to have an account walk around and check the stalls and screenshot what they find for less up-to-date information, which is sufficient for most users of these sites.

Both of these are generally undetectable and do not interfere with the game client. Auto-shopping is also simple depending on the way the player stall is implemented.

Workarounds for this exist, but most are equally easily defeated.