Today, ex-IELTS examiner Cambridge David shares a great idiom that you can use whenever you're talking about how expensive something is, no matter whether that's in a restaurant, on a holiday, or just talking about any object you've bought recently. Idioms are often the key to getting a great score in the 'vocabulary' criteria of IELTS Speaking. Learn this idiom, and start using it in your next IELTS exam.