Lowballed

verb

1. To give an intentionally low estimate of anything, not necessarily with deceptive intent.
2. To give (a customer) a deceptively low price or cost estimate that one has no intention of honoring or to prepare a cost estimate deliberately and misleadingly low.
3. To make an offer well below an item's true value, often to take advantage of the seller's desperation or desire to sell the item quickly.