worth (your/its) weight in gold

extremely useful or valuable.

User-friendly software is worth its weight in gold.

Experienced singers are worth their weight in gold because they bring strength to the choir.

Etymology: based on the idea that gold is the most valuable metal

• there isn't a [mean, jealous, unkind etc.] bone in someone's body
• there is safety in numbers
• there'll be hell to pay
• there's a lot to be said for
• there's a lot to be said for doing something
• there's a lot to be said for something
• There's a time and a place.
• There's life in the old dog yet.
• There's many a slip twixt cup and lip.
• There's many a true word spoken in jest.
• there's method in madness
• there's method in someone's madness
• There's more than one way to skin a cat.
• there's much to be said for
• there's much to be said for doing something
• there's much to be said for something
• There's no accounting for taste!
• there's no law against
• there's no law against doing something
• there's no law against something
• There's no peace for the wicked!
• There's no rest for the wicked!
• There's no smoke without fire.
• There's no such thing as a free lunch.
• there's no telling