3 sentences

1. 幸福永远是买不到的。

   xìng​fú yǒng​yuǎn shì mǎi bu​dào de.

   Happiness can never be bought.

   Source: CCMatrix

2. 什么东西用钱买不到？

   shén​me dōng​xi yòng qián mǎi bu​dào?

   What can't be bought with money?

   Source: OpenSubtitles

3. 在莫斯科你买不到这样的刀。

   zài mò​sī​kē nǐ mǎi bu​dào zhè​yàng de dāo.

   You can't buy a knife like this in Moscow.

   Source: AI Challenger 2017