Related Clues:

• Limited
• At a premium
• Hard to find
• Few and scattered
• Infrequent
• Like hen's teeth, so to speak
• Scattered
• Not dense
• Insufficient
• Like capital letters in many E. E. Cummings poems
• Thinly spread
• Like cabs on a rainy day, seemingly
• In short supply
• Uncom-mon
• Scanty