捡漏
jiǎn​lòu

to score a bargain

捡漏 撿漏 jiǎn//lòu
to score a bargain
to buy a valuable item at a very low price, usually because the seller does not know its true value; to take advantage of an unexpected opportunity
to repair a leak
to inspect and repair a leaky roof
to find fault
(dialect) to nitpick or search for mistakes to use against someone