extortionate
     adj : greatly exceeding bounds of reason or moderation;
           "exorbitant rent"; "extortionate prices"; "spends an
           outrageous amount on entertainment"; "usorious interest
           rate"; "unconscionable spending" [syn: {exorbitant}, {outrageous},
            {steep}, {unconscionable}, {usurious}]
Source: WordNet® 2.0