汽车销售员一开始报了个很低的价格，后来却加了很多额外费用。

The car salesman was ___low-balling the price at first, but later added many extra charges.

他们在谈判时故意低估房产价值，试图压低价格。

They were ___low-balling the property's value during negotiations to drive down the price.