predatory pricing
Economic term for setting prices extremely low to drive out competitors, then raising them later.
The antitrust law prohibits predatory pricing.
Predatory pricing intended to block new entrants became an issue.
不当廉売 is a broader legal term for unfair low-price sales, while 略奪価格 specifically refers to the strategy of eliminating competitors through unsustainable low prices.
Compound of 略奪 (plunder, pillage) and 価格 (price), likely a calque from English 'predatory pricing'.