The Collaborative International Dictionary of English v.0.48:

big-ticket \big-ticket\ adj. prenom.
   same as expensive, but in an absolute sense; -- referring
   to items of a type which are all expensive, such as
   automobiles, refrigerators, or large-screen television sets.
   The roaring stock market led to an increase in the purchase
   of big-ticket items during the 1996 Christmas season. cheap

   Syn: costly, dear, high-priced, pricey, pricy.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

big-ticket
    adj 1: very expensive; "big-ticket items like cars and furs"; "a
           big-ticket government program" [syn: big-ticket(a),
           high-ticket(a)]