WordNet (r) 3.0 (2006):

overpriced
    adj 1: too costly for the value; "overpriced items at resort
           shops"

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "overpriced":
   cutthroat, exacting, excessive, exorbitant, extortionate,
   extravagant, fancy, gouging, grossly overpriced, immoderate,
   inflationary, inordinate, out of bounds, out of sight, outrageous,
   preposterous, prohibitive, skyrocketing, spiraling, unconscionable,
   undue, unreasonable, unwarranted, usurious