be worth its/(one's) weight in gold
To be very valuable, important, or useful. When you're in a foreign country, you'll find that a reliable translator is worth his weight in gold. A computer system that didn't crash all the time would be worth its weight in gold around here!
worth its weight in gold
Fig. very valuable. This book is worth its weight in gold. Oh, Bill. You're wonderful. You're worth your weight in gold.
be worth your (or its) weight in gold
be extremely useful or helpful.be ˌworth your/its ˌweight in ˈgold
be very useful or valuable: My assistant is worth her weight in gold.