of incalculable value/worthof inestimable value/worthof immeasurable value/worthinvaluablebeyond pricewithout priceworth its weight in goldworth a king's ransomrareirreplaceableincomparableunparalleledexpensivecostlyhigh-pricedat a premiumrichdearchoicefineexquisitetreasuredprizedpreciouscherished
