[REQUEST] Making MB selling fairer (in some way)

[Niwashi]

this guy comes along, cuts it by 1/3, and with his next four listings, subsequently undercuts himself to the point of reducing his massive undercut by a further 50%. I kept checking on that guy and he wasn't competing with anyone and kept relisting for that same price while the items sold no more quickly than the history beforehand revealed.

Sounds like he's trying to find the price at which they would start selling more quickly. If they're still taking just as long, he hasn't gotten it low enough yet, and therefore undercuts himself.