premium
/ˈprē-mē-əm/
noun
a reward or recompense for a particular act
a sum over and above a regular price paid chiefly as an inducement or incentive
a sum in advance of or in addition to the nominal value of something
adjective
of exceptional quality or amount; also : higher-priced
idiom
for a high price
difficult to get because there is little available
Land in the county is selling at a premium.