YSK: Always have a mechanic YOU trust inspect a used car before buying, even if buying a "fully certified" car from a dealer. A professional inspection will provide an important extra level of insurance that you're not buying a pack of trouble.
from /r/YouShouldKnow
YSK：在購買二手車之前，一定要讓你信任的機械師檢查二手車，即使從經銷商那裏購買 "完全認證 "的汽車。專業的檢查將提供一個重要的額外的保險，即你不是在買一包麻煩。