At A Premium
Synonyms: Scarce, like gold dust, in short supply, few and far between, rare, in great demand, hard to come by, thin on the ground, not to be had, and rare/scarce as hen's teeth.
Example Sentences
Seats for the concert are at a premium.
Parking spaces downtown are at a premium.
Quality goods are often sold at a premium.
Time is valued at a premium today.