expression, i-adjective
nothing is more expensive than something free; there's no such thing as a free lunch
Proverb warning that free things often come with hidden costs or obligations.
タダより高いものはないというから、無料のセミナーには気をつけたほうがいい。
They say nothing is more expensive than something free, so you should be careful with free seminars.
彼はいつも「タダより高いものはない」と言って、怪しい儲け話には乗らない。
He always says 'there's no such thing as a free lunch' and never falls for suspicious money-making schemes.