
Originally Posted by
Lyrinn
Here is some perspective from the other side with a little bit of game theory mixed in:
At any given point, the player with the cheapest item is in the most likely position to get the sale, largely due to laziness (people don't want to teleport to the right city and/or don't care about tax) or ignorance (many people don't even know there's a city tax). Suppose you have two players, A and B, undercutting each other but B is either less active or unwilling to update prices as frequently as A. Both players can replace an item immediately after it's sold (you see this in slower markets, namely gear). Because A can keep his price on top almost all the time, A is in position to get all of the sales and therefore 100% of the profits while B gets nothing. From B's perspective, he can't keep up with A in the undercut war, and since B doesn't get any of the money anyways, B has no incentive to preserve A's profits. B's best chance is to drop the price by a large enough margin that a prospective buyer might jump on it thinking it's a good deal. Queue big undercut. Repeat this until price crashes.
It's possible B can make a sale right after a normal update but depending on the frequency of sales, this can be unlikely if A is a no-lifer sitting in front of the market board checking retainers all day - like many hardcore crafters. Now, if this behavior frustrates people as much as this thread indicates, B will also make people leave the markets either in frustration or in search of better opportunities. If B can make A quit, B can reset prices to their original value and hold a monopoly on the market.
This is how we see it. The market board isn't some cooperative game; it's a winner-take-all PvP deathmatch. The one way you can avoid the scenario outlined is to price match, which truly "preserves the health of the market board" by keeping prices static instead of forever falling (even if it's just by 1). Yet, I doubt any of you claiming you're "preserving the health of the market board" really care about that. People undercut for only 1 reason and it's to get the sale. There's no other motive involved.
Note: this argument only works for slow markets, not fast moving ones like materials, leve turn-ins, or whatever, and slow moving markets are the only ones with prices in the millions that allow for huge undercuts like what people are complaining about here.