I don't understand it, I just do not understand it!

[Morningstar1337]

The reason people undercut tend to be either

1. because they want more inventory space
2. because they gathered the mats and can therefore make more profit even at lower prices because they don't have to worry about making back the cost on mats (an example: If Purpure Beads are going at 50k, and Asthethe's Cross-Pein Hammers are going for 300k, the the one that gathered their own shell clips can sell their hammers for 250k, and not only sell the item fast, but still make 50k more than the people that had to buy the beads.Going further, if they sell the Beads instead and the Shell Clips and Resin are going for 25k per 4 and 2 of each, then they would've made 100% more money than those that had to buy the mats)
3. or because they find the items too overpriced and want to crash it.

None of these are mutually exclusive. A gatherer would obviously benefit from more inventory space and it is still possible to make a profit while bringing the market down. Especially if people buy your wares with the intent to sell them at the inflated markup you were trying to rout.

[Angelhearth]

The reason people undercut tend to be either

1. because they want more inventory space
2. because they gathered the mats and can therefore make more profit even at lower prices because they don't have to worry about making back the cost on mats (an example: If Purpure Beads are going at 50k, and Asthethe's Cross-Pein Hammers are going for 300k, the the one that gathered their own shell clips can sell their hammers for 250k, and not only sell the item fast, but still make 50k more than the people that had to buy the beads.Going further, if they sell the Beads instead and the Shell Clips and Resin are going for 25k per 4 and 2 of each, then they would've made 100% more money than those that had to buy the mats)
3. or because they find the items too overpriced and want to crash it.

None of these are mutually exclusive. A gatherer would obviously benefit from more inventory space and it is still possible to make a profit while bringing the market down. Especially if people buy your wares with the intent to sell them at the inflated markup you were trying to rout.

Did you read Curisu's answer, just before yours? That's the reason I was expecting to hear, sooner or later. We don't care, we have too much gil, we don't know what to do with it, so we destroy the market for the rest of you.

I can understand the reasons you come up with, but they don't seem to correlate to what I see (in a very few cases). To sell in large quanta, undercutting dramatically, and continue doing so, isn't for any normal reasons, it's to make trouble for those who genuinely try earning on the market. I dump sometimes, but I do it so much lower than the going rate (normally 50%) that it should be obvious I just wan't to get rid of it. Although, some still try to compete with those prices, for reasons I just can't figure out. Leave it be, players will buy it in no time if you don't underbid, they'll even come from other servers.