premium
1 bonus, boon, bounty, fee, percentage (informal) perk (Brit. informal) perquisite, prize, recompense, remuneration, reward
2 appreciation, regard, stock, store, value
3 at a premium beyond one's means, costly, expensive, hard to come by, in great demand, in short supply, like gold dust, not to be had for love or money, rare, scarce, valuable