They tell you "Time is money," as if your life was worth its weight in gold. Bob Dylan
Frank Marth also played many characters with us, and like George Petrie, he was worth his weight in gold. Audrey Meadows
But what's worth more than gold?" "Practically everything. You, for example. Gold is heavy. Your weight in gold is not very much gold at all. Aren't you worth more than that? Terry Pratchett
Now cheaply bought for thrice their weight in gold. John Ferriar
He is worth his weight in gold. (16th century) English Proverb